ESBD_504231_1775507825809_02. Specification DMS-11170.pdf

DEPARTMENTAL MATERIALS SPECIFICATION

FULLY ACTUATED, SOLID-STATE TRAFFIC SIGNAL

CONTROLLER ASSEMBLY

TRAFFIC SAFETY DIVISION 1 – 40

EFFECTIVE DATE: OCTOBER 2025

REVIEW DATE: OCTOBER 2025

DMS - 11170

FULLY ACTUATED, SOLID-STATE TRAFFIC SIGNAL CONTROLLER

ASSEMBLY

EFFECTIVE DATE: OCTOBER 2025

11170.1. Description. This Specification governs for a shelf-mounted, 16-phase, full-actuated, solid-state controller unit with internal time based coordination (TBC), railroad and fire

(emergency vehicle) preemption (PE), diamond-intersection operation, and closed-loop secondary operation in a traffic signal controller assembly and cabinet assembly.

11170.2. Units of Measurements. The values given in parentheses (if provided) are not standard and may not be exact mathematical conversions. Use each system of units separately.

Combining values from the two systems may result in nonconformance with the standard.

▪ Material Producer List. The Traffic Safety Division (TRF), Traffic Management Section

(TM), maintains the Material Producer List (MPL of all materials and products conforming to the requirements of this specification. Materials and products appearing on the MPL, entitled

“Traffic Signals,” require no further sampling and testing before use, unless deemed necessary by the Project Engineer or TRF TM.

The MPLs associated with this DMS include notations that identify products or materials that are pre-certified to comply with Buy America, Gold Star certification. Submit the Department’s

“Buy America Certification” Form 2812 found on TxDOT.gov for Gold Star certification.

Provide additional form or documentation upon Department request. Submit new form if material or product Buy America compliance status changes. Build America, Buy America

(BABA) compliance status change means anytime the product’s Buy America status as represented on the MPL changes. The Department maintains authority for establishing BABA material classifications (iron or steel, manufactured product, construction material or excluded material).

11170.3. Bidders’ and Suppliers’ Requirements. To be accepted on bids, materials must have approved product codes or designations and be from pre-qualified producers.

The supplier's facilities must be of sufficient size and staffing to allow warranty repairs to the cabinet assembly on a timely basis. Timely return of equipment is no more than 18 calendar days from the date of receipt by the supplier to the return receipt of the equipment at the specified location. This requirement may be met by field service. Failure to meet these requirements may result in rejection of future bids.

Ship the controller cabinet enclosed in cardboard on 4 × 4 in. (100 × 100 mm) runners covered with 0.5-in. (12.5-mm) plywood to facilitate handling. Runners consisting of stacked 2 × 2 in.

(50 × 50 mm) boards are not acceptable.

For ventilation purposes while testing, do not bubble wrap or package cabinet components in boxes when shipping.

https://www.txdot.gov/content/dam/docs/division/mtd/mpl/qtrfsigeqp.pdf

TRAFFIC SAFETY DIVISION 2 – 40

Use polypropylene strapping material to secure all cabinet components for shipping. Glass filament tape may be used to secure load switches and flash transfer relays. Other means of securing components are acceptable but require written approval by the TRF Signal Operations

Engineer.

11170.4. Pre-Qualification Procedure.

A. Pre-Qualification Request. Submit a request for evaluation to the Texas Department of

Transportation, Traffic Safety Division, Traffic Engineering Section (TRF-TE), 6230 E.

Stassney Lane, Austin, Texas 78744.

B. Pre-Qualification Sample. Submit one signal controller cabinet assembly with the pre-qualification request.

All materials submitted for pre-qualification tests will be at no cost to the Department.

C. Documentation.

1. Cabinet. Provide each cabinet with the following documentation:

• Three complete, accurate, and fully legible diagrams and one schematic for every electronic device (This must include but not be limited to cabinet-wiring, back panel, detector-panel, power-panel, PE-panel, flasher-circuit, load-switch, card-rack-power-supply, bus-interface-unit, and power-supply diagrams.)

• Complete parts list including names of vendors for parts not identified by universal part numbers such as JEDEC, RETMA, or EIA

• Manufacturer's specifications for cooling fans including the CFM rating of fans

2. Controller Unit. Provide each controller unit with one service manual per unit that includes description of controller unit, description of its operation, and basic maintenance and troubleshooting information.

3. Malfunction Management Unit (MMU). Provide each MMU with one service manual per unit that includes description of MMU unit, description of its operation and basic maintenance, and troubleshooting information

Bidders must be prepared to furnish NEMA certification for the complete cabinet assembly from an independent laboratory.

D. Sampling and Testing. Signal controller cabinet assemblies must meet or exceed the requirements of all applicable National Electrical Manufacturers Association (NEMA), Texas Manual on Uniform Traffic Control Devices (TMUTCD), and Institute of

Transportation Engineers (ITE) Standards and this Specification. In addition to testing of pre-shipment samples, complete testing of signal controller assemblies may be required at any time before acceptance.

Burn-in each controller cabinet assembly for a period of 48 hr. at a temperature of 60°C or for a period of 96 hr. at a temperature of 23°C. Include with or attach a certification to each controller cabinet indicating the dates of the burn-in period, number of hours, burn-in temperature, and results.

TRAFFIC SAFETY DIVISION 3 – 40

The Department may test any controller cabinet assembly under load in a shop environment for a period of at least 120 hr. During this time, the Department will inspect the entire controller cabinet assembly for compliance with the Specifications.

The Department may then perform any or all tests described in NEMA Standard

Publication TS 2 1998 on one or more complete controller cabinet assemblies on a random sample basis. Environmental sampling and testing will be in accordance with

Tex-1170-T. Testing will be performed in the normal operating (i.e., non-flashing) range of 95-135 VAC. All traffic signal cabinet assembly components must operate normally at

95 VAC, just as the unit would operate at 120 VAC.

Provide TRF with closed-loop software, hardware, and cables needed to monitor controller operations during testing.

E. Warranty. All equipment must have no less than 95% of the manufacturer's standard warranty remaining on the date that the contractor submits equipment invoices for payment. The Department will not accept any equipment with less than 95% of its warranty remaining.

The cabinet assembly including all contents must be fully warranted for parts and labor for a minimum of 5 years from the date of acceptance.

Software and firmware updates must be included as part of the warranty.

F. Evaluation. TRF-TE will notify prospective bidders and suppliers after completion of material evaluation.

1. Qualification. If approved for use by the Department, the material will be added to the

MPL. If material is listed on the MPL, no additional submittals are required for that product.

Date of acceptance will be date that TRF approves the controller cabinet assembly.

The traffic signal controllers and cabinets must be identical to the approved pre-qualification sample. Submit any deviations from the approved sample for evaluation and approval before any shipment is accepted for payment.

Deviations from the approved sample after shipment of any parts of the order will be cause for rejection and nonpayment of the remainder of the order. Excessive delays or noncompliance by the vendor at any point in the approval process may be cause for cancellation and nonpayment.

2. Failure. Producers not qualified under this Specification may not furnish materials for

Department projects and must show evidence of correction of all deficiencies before reconsideration for qualification.

If any of the assemblies fail any of the tests, the supplier will be permitted to make one complete repair of the order on a timely basis, as determined by the Department. The supplier must reimburse the Department for any retesting required during acceptance.

The Department will base the cost for each retest, estimated at $1,500 per test, on time and charges.

TRAFFIC SAFETY DIVISION 4 – 40

Minor discrepancies noted in sampling and testing of this item must be corrected within

30 days of written notice of the discrepancies or as stated in the notice. Major discrepancies that in the opinion of the Department will substantially delay receipt and acceptance of the item will be cause for cancellation of the purchase order. Correct any discrepancies found in partial shipments before the delivery of subsequent shipments.

11170.5. Material Requirements.

A. Controller Unit. The controller unit must meet the requirements of NEMA Standards

Publication TS 2-2003 (TS 2), latest edition. Where a difference occurs, these requirements govern. The purchase document must identify either a TS 2 Type 1 interface or TS 2 Type 2 interface. This document specifies the cabinets for TS 2 Type 1 controllers. TS 2 Type 2 controller cabinets must use a cabinet specification identified in the bid document.

Each controller unit must have a unique serial number permanently and neatly displayed on the face of the unit. Affix an additional temporary label, neatly printed or typed, to the controller unit face if the serial number is not on the face of the unit.

Provide a controller unit that is completely solid state and digitally timed. All timing must be referenced to the 60-Hz power line.

The dimensions of the controller unit must not exceed 12.2 in. (305 mm) H, 17.6 in.

(440 mm) W, and 12.2 in. (305 mm) D.

Supply both TS 2 Type 1 and TS 2 Type 2 controllers with Port 1 SDLC and Port 2

RS 232. The TS 2 specification defines the connectors. Provide either a 9 pin RS 232 or

25 pin RS 232 connector for Port 3 for radio communications. When specified in the plans, provide an additional 9 pin FSK connector capable of FSK communications with

FSK modem installed. The controller must have a minimum of one Ethernet port on the front face of the unit.

The controller unit must be built using one or more vertical circuit boards. Requirement exceptions are the power supply, transformers, capacitors, and heat dissipating components.

No circuit cuts will be allowed on circuit boards in any of the equipment supplied. Any wire jumpers included on circuit boards must be in plated through-holes specifically designed to contain them. Jumpers that are tack soldered to circuit traces or are added to correct board layout errors are not acceptable.

Each of the following must be simultaneously displayed during standard NEMA dual-ring operation on the face of the unit:

• Phases in service (one per ring)

• Phases next to be serviced (one per ring)

• Presence of vehicle call (one per phase)

• Presence of pedestrian call (one per phase)

• Reason for green termination (one per ring)

▪ Gap-out

TRAFFIC SAFETY DIVISION 5 – 40

▪ Maximum time-out

▪ Force-off

• Pedestrian service (one per ring)

• Max II in effect (one per ring)

User-programmed entries must be stored and maintained in nonvolatile memory. Battery power is not allowed for this application.

The controller unit must be designed to operate properly with the logic ground isolated from the AC neutral (common).

Provide a high-quality keyboard with a rated lifetime of 1 × 106 operations or keystrokes on the front panel of the controller unit for use programming all user-entered timings and settings. Provide an operator entry that enables and disables the audible sound output

(default must be enabled).

Provide a direct-reading, alphanumeric liquid crystal display (LCD) with back lighting on the front panel of the controller unit. The display must be clearly readable in ambient light—including the cabinet light, full sunlight, or the absence of light—from a distance of 1.0 m at a 45° angle. The display must have an automatic time-out feature approximately 10 minutes after the last keystroke, unless the display has an expected continuous life of 10 years or more, and must have an operating temperature range of -34°C to + 74°C.

The display must be a minimum 40-character × 4-line display. The bidder may be required to supply literature demonstrating that all display requirements of this

Specification are met before the awarding of the bid. (If a LCD contrast adjustment is required for visibility at temperature extremes, then the control must be on the face of the controller unit, adjustable without the use of tools.)

B. Time Clock. The clock must use the 60-Hz power line frequency as time base when power is present. The clock operating voltage range must be 89 to 135 VAC over the temperature range of −34°C to +74°C. A 10-year lithium battery must maintain the time-of-day clock and digital data during a power outage lasting up to 30 days. Lead-acid, nickel-cadmium, or alkaline batteries are not acceptable.

The time base clock must be maintained to within ± 0.005% at 20°C and to within a

± 0.02% over the specified operating temperature range as compared to Coordinated

Universal Time (WWV) standard for a period of 30 days during periods when AC power is not applied.

C. Clock-Calendar Programming. The clock must:

• Be easily set to the year, month, day of month, day of week, hour, minute, and second

• Must store sequences of operations in the form of 255 entries and 15-day plans

The keyboard must provide:

• Automatic daylight-savings time entry

• Capability for the user to program dates for fixed and floating holidays

TRAFFIC SAFETY DIVISION 6 – 40

Special Calendar adjustments for leap years must be automatic.

TRAFFIC SAFETY DIVISION 7 – 40

Table 1

Schedules

Global Time Base Schedule Actuated Traffic Signal

Schedule

Entry Months Dates of Mo Days of Wk. Day Plan Time Base Actions

1 1–12 1–31 1–7 1–15 entry 1 actions

255 " " " " entry 255 actions

1. Structure and Interrelationship of Programs. A day plan must consist of the following, where each action is unique:

Table 2

Structure and Interrelationship of Programs

Hour : Minute Action 1 (time to implement: action to implement)

Hour : Minute Action 10 (time to implement: action to implement)

There must be a minimum of 10 actions per day plan.

There must be a minimum of 15-day plans.

Each action in a day plan must consist of a group of the following objects:

• Pattern, consisting of:

▪ Cycle length

▪ Offset

▪ Split

▪ MUTCD flash (on-off)

▪ Free operation

• Sequence

• Special functions 1–8 (on-off)

• Auxiliary functions 1–3 (on-off)

• Mode of operation (a means of changing operating modes by time of day)

• Max II

• Gap / extension II

• Phase omits

Any or all of these may be selected within a single action.

Transfer into and out of FLASH must be in accordance with the Texas MUTCD. It must be possible to program each phase and overlap to flash either yellow or red via the front panel of the controller unit. This must be accomplished by flashing the load-switch driver outputs simultaneously.

TRAFFIC SAFETY DIVISION 8 – 40

An entry must consist of time period implemented: day plan, months, dates of the month, and days of the week.

A minimum of 255 entries must be programmable.

There must be a copy feature that allows the transfer of entries between day plans.

Other programming schemes that meet the functional intent are acceptable but require approval in writing by the TRF Signal Operations Engineer.

D. TBC. The internal reference sync pulse, from which the local offset is calculated, must resynchronize at midnight, or the resynchronization must be user programmable with a default to midnight. A pulse must be generated whenever the time-of-day clock shows a time that is an exact multiple of the current cycle length after this resynchronization. In case of a power failure, re-sync must be calculated from the programmed re-sync time.

The power failure recovery routine must accommodate the case of a power failure at midnight.

E. Diamond Operation.

1. Program Requirements. Assign phase numbers to traffic movements as shown on the diamond intersection layout in the following figure. Overlap A (OL A) is defined as phases 1+2. Overlap B (OL B) is defined as phases 5+6.

4 3

OL A

2 OL B

Figure 1

Assignment of phase numbers for diamond intersection layout.

There must be six additional user-programmable overlaps. All additional overlaps must be programmable through the keyboard and must function as specified by TS 2.

The controller unit must be programmable for four-phase and three-phase diamond operation as well as for two independent, four-phase rings (separate intersection operation) as shown in the following figure.

TRAFFIC SAFETY DIVISION 9 – 40

4 3 2 1

8 7 6 5

Ring 1

Ring 2

Figure 2

Separate intersection ring structure.

The following modes must be available for each phase and for the intervals identified as special intervals in three-phase and four-phase operation:

• Maximum Recall

• Minimum Recall

• Pedestrian Recall

• Detector Locking and Non-Locking Memory

• Phase Omit

The controller unit must be designed to provide pedestrian phasing with phases two, four, six, and eight.

All timing entries and displays must be available for phases three and seven.

The operation of the controller unit as a four-phase, three-phase, or separate-intersection-operation diamond must be keyboard selectable. This must be overridden while under closed-loop system control or by TBC control.

2. Four-Phase Operation. The controller unit must perform the sequences for four-phase and 6-phase diamond operation defined in Figures 3–8.

The normal four-phase operation sequence must be: 18164525 →→→ . The six-phase operation sequence must be: 181716453525 →→→→→ .

The point at which operation may be switched from four-phase to three-phase operation must be at the clearance interval 2516B or 2518B to the three-phase clearance interval 15.

3. Concurrent Timing Requirements. Refer to Figures 3–6 for the following descriptions:

Intervals 4516B and 4516C must time concurrently with interval 16; however, interval

16 may not terminate green until interval 4516C has timed out.

Intervals 3516B and 3516C must time concurrently with interval 16; however, interval

16 may not terminate green until interval 3516C has timed out.

TRAFFIC SAFETY DIVISION 10 – 40

Intervals 1825B and 1825C must time concurrently with interval 25; however, interval 25 may not terminate green until interval 1825C has timed out.

Intervals 1725B and 1725C must time concurrently with interval 25; however, interval 25 may not terminate green until interval 1725C has timed out.

All left-to-right internal clearance times (intervals 4518B, 4517B, 3518B, 3517B, 2518B, 2517B, and 2516B) must use the same timing settings for minimum green, extension, maximum (max) green, yellow clearance, and red clearance.

All right-to-left internal clearance times (intervals 1845B, 1835B, 1745B, 1735B, 1645B, 1635B, and 1625B) must use the same timing settings for minimum green, extension, max green, yellow clearance, and red clearance.

Separate timing settings for minimum green, extension, max green, yellow clearance, and red clearance must be provided for each of the four external clearance intervals

(1825B, 1725B, 4516B, and 3516B).

Clearance Interval to 16

2516A

2516C 2517C or 2518C

From 25 Clearance Interval to 35 or 45

2535A or 2545A

Clearance Interval to 17 or 18

2517A or 2518A

2516B* 2517B* or 2518B*

* Special Interval

Figure 3

Four-phase operation sequence—clearance intervals from phase 25.

TRAFFIC SAFETY DIVISION 11 – 40

4517C or 4518C 4516C

4517B* or 4518B*

From 45 Clearance Interval to 25 or 35

4525A or 4535A

Clearance Interval to 17 or 18

4517A or 4518A 4516A

Clearance Interval to 16

4516B*

Figure 4

Four-phase operation sequence—clearance intervals from phase 45.

1835B* or 1845B*

1835C or 1845C

From 18 Clearance Interval to 16 or 17

1816A or1817A

Clearance Interval to 35 or 45

1835A or 1845A 1825A

Clearance Interval to 25

1825B*

1825C

Figure 5

Four-phase operation sequence—clearance intervals from phase 18.

TRAFFIC SAFETY DIVISION 12 – 40

From 16

Clearance Interval to 17 or 18

1617A or 1618A

Clearance Interval to 25

1625A

Clearance Interval to 35 or 45

1635A or 1645A

1625B* 1635B* or 1645B*

1625C 1635C or 1645C

Figure 6

Four-phase operation sequence—clearance intervals from phase 16.

1735B* or 1745B*

1735C or 1745C

From 17 Clearance Interval to 16 or 18

1716A or 1718A

Clearance Interval to 35 or 45

1735A or 1745A 1725A

Clearance Interval to 25

1725B*

1725C

Figure 7

Four-phase operation sequence—clearance intervals from phase 17.

TRAFFIC SAFETY DIVISION 13 – 40

3517B* or 3518B*

3517C or 3518C

From 35 Clearance Interval to 25 or 45

3525A or 3545A

Clearance Interval to 17 or 18

3517A or 3518A 3516A

Clearance Interval to 16

3516B*

3516C

Figure 8

Four-phase operation sequence—clearance intervals from phase 35.

4. Diamond Detector Operation. The loop-detector layout for three-phase, four-phase, six-phase, or separate-intersection diamond operation must be as shown in the following figure. The detector operation defined must be automatically loaded when any diamond sequences are selected.

1 1

11 2

8 7

14 13

Figure 9

Loop-detector layout for diamond-intersection operation.

The controller unit software must provide the logic for detector operation described in

Table 3.

TRAFFIC SAFETY DIVISION 14 – 40

Table 3

Detector Operation Requirements

Detector Four- and Three-Phase Requirements

1 In 4-phase operation:

▪ Must call phase 6 if Overlap A is not green and phase 7 is not called.

▪ Must call phase 6 if Overlap A is not green and phase 8 is not called.

▪ Extend intervals 2516B, 2517B, 2518B, 4517B, 4518B, 3517B, and 3518B.

In 3-phase operation:

▪ Must call and extend phase 1 (left turn).

5 In 4-phase operation:

▪ Must call phase 2 if Overlap B is not green and phase 3 is not called.

▪ Must call phase 2 if Overlap B is not green and phase 4 is not called.

▪ Extend Intervals 1625B, 1635B, 1645B, 1735B, 1745B, 1835B, and 1845B.

In 3-phase operation:

▪ Must call and extend phase 5 (left turn).

2, 3, 4, 6, 7, and 8

These setback detectors (or detector sets) belong to the parent phases with the same number

(e.g., detector 2 belongs to phase 2) as shown in Figure 9. These detectors must have a 2-sec.

delay set during red conditions of their parent phase. The detectors are used to extend the parent phase during green.

11, 12, 15, 16, 17, and

These detectors are stop bar detectors and are used to call the associated parent phases shown in

Figure 9. The parent phase green plus a call for that phase plus a 0.2-sec. gap on the detector must disable the detector until the end of green.

9 and 10 In 4-phase operation:

▪ Must extend phase 2 if phase 3 is called

▪ Must extend phase 2 if phase 4 is called

▪ Must call phase 6 if Overlap A is not green and phase 7 is not called

▪ Must call phase 6 if Overlap A is not green and phase 8 is not called

▪ Extend intervals 2516B, 2517B, 2518B, 4517B, 4518B, 3517B, and 3518B

In 3 phase operation:

▪ Must function as a phase-1 calling detector during phase 3 or 4 and as a phase-1 extending detector when a phase 3 or 4 call exists

13 and 14 In 4 phase operation:

▪ Must extend phase 6 if phase 7 is called

▪ Must extend phase 6 if phase 8 is called

▪ Must call phase 2 if Overlap B is not green and phase 3 is not called

▪ Must call phase 2 if Overlap B is not green and phase 4 is not called

▪ Extend Intervals 1625B, 1635B, 1645B, 1735B, 1745B, 1835B, and 1845B

In 3 phase operation:

▪ Must function as a phase-5 calling detector during phase 7 or 8 and as a phase-5 extending detector when a phase 7 or 8 call exists

TRAFFIC SAFETY DIVISION 15 – 40

5. Three-Phase Operation. The controller unit must be keyboard selectable for three-phase diamond operation.

The controller unit must perform the sequences for three-phase diamond operation defined in Figure 10 and in Table 4.

The normal sequence of operation must be 516284 +→+→+ .

The point at which operation may be switched from three-phase to four-phase operation must be through the transition phase sequence to four-phase interval 25 as indicated in

Figure 10.

The controller must be programmable for simultaneous gap operation for phases 4 and

8 in three-phase operation to allow a phase to extend out of a green rest state. When the phase or phases to be serviced next conflict with both phases being serviced, both concurrent phases must reach a green rest state together before they terminate.

Termination of the max timer or application of a force-off must override this feature.

The phases must not be allowed to advance to a green interval beyond the rest state that might override or defeat the simultaneous gap operation.

Transition Phase to

4 Phase Operation

Figure 10

Three-phase diamond operation.

TRAFFIC SAFETY DIVISION 16 – 40

Table 4

Three-Phase Diamond Sequence

From

Interval

IF

Call On

AND

No Call

On

GO TO

Interval

48 2 and 6 ---- 2+6

2 or 6 1 or 5 2+6

1 and 6 2 1+6

2 and 5 6 2+5

5 1 or 2 or 6 4+5

4 and 5 8 4+5 If Min Time of 5 Can be Serviced Before Max Time of

1 2 or 5 or 6 1+8

1 and 8 4 1+8 If Min Time of 1 Can be Serviced Before Max Time of

1 and 5 2 or 6 1+5

45 8 ---- 4+8 if 4+8 Was Not Serviced Immediately Before 4+5

8 1 or 2 or 6 4+8

2 and 6 8 2+6

6 8 or 1 2+6

2 8 or 6 2+5

1 and 6 8 or 2 1+6

1 8 or 2 or 6 1+5

18 4 ---- 4+8 if 4+8 Was Not Serviced Immediately Before 1+8

4 5 or 2 or 6 4+8

2 and 6 4 2+6

2 4 or 5 2+6

6 4 or 2 1+6

2 and 5 4 or 6 2+5

5 4 or 2 or 6 1+5

26 (1 and 5) or

4 or 8

2 or 6 1+5

5 6 or 4 or 8 2+5

2 and 5 6 2+5

1 2 or 4 or 8 1+6

1 and 6 2 1+6

25 1 or 8 ---- 1+5

4 1 or 8 4+5

6 1 or 4 or 8 2+6

16 4 or 5 ---- 1+5

8 4 or 5 1+8

TRAFFIC SAFETY DIVISION 17 – 40

From

Interval

IF

Call On

AND

No Call

On

GO TO

Interval

2 4 or 5 or 8 2+6

15 4 and 8 ---- 4+8

4 8 4+5

8 4 1+8

2 and 6 4 or 8 2+6

2 4 or 6 or 8 2+5

6 2 or 4 or 8 1+6

F. Coordination-Control Hierarchy. When the system switch is in the SYSTEM position, the controller unit must be under the control of the master controller or TBC.

In the absence of any on line closed-loop-system control by a master controller, the internal TBC must control the coordinated, free, and flash operation of the intersection when the system switch is in the SYSTEM position.

When a master controller brings the intersection on line, its control must supersede that of the internal time-base coordination.

When the system switch is in the FREE position, the controller unit must operate in a non-coordinated (free) mode.

G. Preemption (PE). The internal preemptor supplied must be easily programmable from the front panel for either railroad- or emergency-vehicle PE sequences.

Phases must be selectable such that a limited signal sequence may be operational during

PE. It must be possible to add phases that are not in the intersection sequence to this special limited sequence without adding external logic.

The intervals shown in Table 5 must be provided as a minimum. Terminology may vary, but the meaning must be clear. Additional unspecified intervals that may lead to confusion must be programmable to zero. If abbreviations are used on the display, they must be defined on the front panel. While in PE, the display must clearly identify the intervals being timed as PE intervals. Yellow and red clearances from the phase timings may be used in place of the clearance intervals shown.

TRAFFIC SAFETY DIVISION 18 – 40

Table 5

PE Timing Interval Definitions

Interval1 Description

0. PE Delay This time must start immediately when the PE command is received. It must not affect the normal operation of the controller unit until the delay time out occurs. This interval may be used for emergency-vehicle (fire-lane) PE delay. If zero time is set, the interval must be omitted.

1. PE Minimum

Duration

The PE sequence must not terminate until the PE input signal is removed and the Minimum Duration time has expired.

2. PE Minimum Green Any vehicle signal that is green at the time this interval becomes active must not terminate unless it has been displayed for at least the time programmed in this interval. If zero time is set, the interval must be omitted.

3. PE Minimum Walk PE Minimum Walk Time (in seconds). A PE-initiated transition must not cause the termination of a

Walk before its display for this period.

4. PE Ped Clearance At the time of PE call, walk-indications must immediately change to Pedestrian Clearance interval.

The Pedestrian Clearance interval must not terminate unless it has been displayed for at least the time programmed in this interval. If zero time is set, the interval must be omitted.

5. PE Track Green Signals programmed as track (or fire-lane) signals must remain green or be changed to green. All other signals must be red. This interval must be optionally programmable to zero during emergency-vehicle PE.

6. PE Dwell Green Minimum Dwell Time (entered in seconds). This parameter controls the minimum timing for the dwell movement. The phases allowed during the dwell interval must be selectable to include all phases that do not cross the track. The dwell interval must not terminate before the completion of

PE-duration time and PE-dwell time, and until the call is no longer present. Each signal must be keyboard-programmable for red, red flash, yellow flash, or green. As an alternative, a limited cycle must be programmable for use with railroad PEs.

7. PE Exit Ped Clear PE Exit Pedestrian Clear Time (in seconds). This parameter controls the pedestrian clear timing for a walk signal transition to the exit phase or phases.

8. PE Exit Yellow This interval must provide a solid yellow clearance for indications that were green or flashing yellow. Red and flashing red displays must display solid red.

9. PE Exit Red

Clearance

This interval must be an all-red clearance in preparation for return to the normal cycle. Return phases must be programmable from the keyboard.

10. PE Max Call This interval is the amount of time that a PE call may remain active and be considered valid. When the PE call has been active for this amount of time, the controller must return to normal operation.

The PE call must be considered invalid until the call is no longer active.

1. 1. All intervals are sequential.

TRAFFIC SAFETY DIVISION 19 – 40

Table 6 shows PE timing interval ranges.

Table 6

PE Timing Interval Ranges

Timing Interval Time

(seconds)

Increments

(seconds)

0. PE Delay (Emergency vehicle PE) 0–999 1

1. PE Minimum Duration 0–999 1

2. PE Minimum Green 1–255 1

3. PE Minimum Walk 1–255 1

4. PE Ped Clearance 1–255 1

5. PE Track Green 1–255 1

6. PE Dwell Green 1–255 1

7. PE Exit Ped Clear 0–255 1

8. PE Exit Yellow 3.0–25.5 0.1

9. PE Exit Red Clearance 0–25.5 0.1

10. PE Max Call 0–999 1

The phases to be serviced following the PE sequence must be front-panel-keyboard programmable.

PE sequences must be selectable using external inputs. PE priority must be assigned with

#1 being the highest. If a higher-priority PE input is received during a PE sequence, the controller unit must immediately transition to the new sequence subject to the constraints of PE Minimum Green and PE Minimum Walk. The transition must take place in a safe manner from any point in the sequence and must meet all Texas MUTCD requirements.

Provisions must be made to clear two conflicting track phases from a single PE input.

This may be provided by two-track clearance phases for a single PE or by combining two

PEs.

PE 1 must be reserved for a priority railroad PE. If more than two PEs are provided, it must be possible to delete the priority override for all but the railroad PE. If a non-priority

PE is activated during another PE cycle, the one in progress must continue through its entire cycle. If the second PE input is still active when the first one is completed, the controller unit must immediately go to all-red flash or initiate the non-priority PE. When all PE inputs are removed, the controller unit must proceed through the normal sequence to Return Red Clearance (interval 9).

Once the controller unit has entered the first timed interval following PE Delay

(interval 1), the sequence must continue to the end, even if the PE call is dropped. If the call returns, the Minimum Preempt Duration (interval 1) the controller unit should reinitiate track green and complete the PE sequence.

The controller unit must be programmable to be in flash or in limited sequence during interval 6. If flash is specified, the phases must flash yellow or red as programmed from the front panel. Flash must be implemented by simultaneously flashing the appropriate

TRAFFIC SAFETY DIVISION 20 – 40

load-switch driver outputs. If limited sequence is selected, all phases must be programmable even if not normally used in the intersection sequence.

In the event of a power interrupt as defined by TS 2, if the PE command is present when power is restored, the controller unit must power up in cabinet flash operation and remain there until the PE command is removed.

Overlap phases must begin and terminate with the parent phases as described in TS 2. If the PE call occurs during yellow or red displays between parent phases, the overlap phase must display a minimum of 3 sec. of yellow and a minimum of 1 sec. of red clearance.

“Don't Walk” must be displayed throughout the PE sequence unless a limited cycle is run.

During a limited cycle (interval 6), the pedestrian heads may be programmed to be dark.

PE routines must have priority over all controller functions.

The controller must be programmable to allow multiple track clearance phases either within a single PE sequence or by mapping multiple PEs together in all modes of operation including 3-phase and 4-phase diamond modes.

H. Closed-Loop Operation and Monitoring Software (CLS). The controller software must either be capable of implementing the NTCIP or be downward compatible with CLS masters supplied by the same manufacturer since January 1992 and provide all necessary components to upgrade to NTCIP, as specified by the plans. Short-haul FSK modems, necessary to operate the controller as a closed-loop-system secondary, must be provided internal to the timer. All necessary cables and communication ports needed for operation in a closed-loop-system cabinet must be provided. The modems must meet TS 2 environmental requirements for traffic signal equipment.

Window-based CLS software must be provided (with a minimum of five licensed users per copy), according to the plans or the Invitation to Bid, that allows the monitoring, setup, and programming of all controller unit timing entries, functions, and features.

These functions and features must include but not be limited to the following:

• Monitoring signal indications, detectors, alarms, and time-based functions

• Controller-database error checking

• Coordination parameters

• Remote resetting of coordination errors

• Toggle-special function outputs from the controller

• Ability to receive reports and alarms generated from the controller

• Setting up the dial-up modem for the traffic-signal controller needed to accomplish remote operation through the controller or the PC software

The setup strings for Hayes-compatible modems (including Hayes, US Robotics, and

Computer Peripherals modems as a minimum) must be provided.

All controller-keyboard capabilities must also be available remotely through the computer interface through a telephone modem connection. The controller unit must not have to be connected while making entries until the actual download-upload process.

TRAFFIC SAFETY DIVISION 21 – 40

Supply a cable to direct-connect the controller to a PC in order to upload and download data as well as monitor the controller operation.

The controller must have a minimum of eight detector inputs per intersection for use with closed-loop-system operation. The system must report volume and occupancy counts based on a user-selectable period for each detector. Storage of this data may take place at either the local controller or on-street master. Make allowances in the software for a minimum of eight system detectors at any local controller, in addition to any local detectors.

I. NTCIP Compliance. The software must comply with NEMA Standard Publication

TS 3.2-1996 (TS 3.2) and must meet the requirements for Conformance Level 2. The software must comply with NEMA Standard Publication TS 3.3-1996 (TS 3.3) Class B profile and must include both an EIA/TIA 232-E and an FSK modem interface for NTCIP-based communications.

The software must implement all mandatory objects of all mandatory conformance groups as defined in “Global Object Definitions,” NEMA Standard Publication NTCIP 1201:1996

(TS 3.4):

• Configuration Conformance Group and Actuated Signal Controller Object Definitions, NEMA Standard Publication NTCIP 1202:1996 (TS 3.5)

• Phase Conformance Group

• Detector Conformance Group

The software must implement all mandatory objects of all optional conformance groups as defined in “Global Object Definitions,” NTCIP 1201:1996:

• Database Management Conformance Group

• Time Management Conformance Group

• Time Base Event Schedule Conformance Group

• Report Conformance Group

• STMF Conformance Group

• PMPP Conformance Group and Actuated Signal Controller Object Definitions, NTCIP

1202: 1996.

• Volume Occupancy Report Conformance Group

• Unit Conformance Group

• Special Function Conformance Group

• Coordination Conformance Group

• Time Base Conformance Group

• Preempt Conformance Group

• Ring Conformance Group

• Channel Conformance Group

• Overlap Conformance Group

TRAFFIC SAFETY DIVISION 22 – 40

• TS 2 Port 1 Conformance Group

The software must also implement the following optional objects as defined in “Global

Object Definitions,” NTCIP 1201:1996:

• globalSetIDParameter

• dbMakeID

• eventLogOID

• eventConfigAction and

• eventClassDescription

The software must also implement the following optional objects as defined in “Actuated

Signal Controller Object Definitions,” NTCIP 1202:1996:

• unitRedRevert

• phaseDynamicMaxLimit

• phaseDynamicMaxStep

• phaseControlGroupTable

• ringControlGroupForceOff

• vehicleDetectorQueueLimit

• vehicleDetectorFailTime

• vehicleDetectorReportedAlarms

• alarmGroupTable

• specialFunctionOutputTable

• preemptMinimumGreen

• preemptMinimumWalk

• preemptEnterPedClear

• preemptState

• preemptControlTable

• ringControlGroupMax2

• ringControlGroupMaxInhibit

All objects required by these procurement Specifications must support all values within their standardized ranges, unless otherwise approved by the Project Engineer. A size, range, or enumerated listing indicated in the object's SYNTAX field or through descriptive text in the object's DESCRIPTION field of the relevant standard defines the “standardized range.” Table 7 provides the current listing of known variances for this project.

TRAFFIC SAFETY DIVISION 23 – 40

Table 7

Object Range Values for Actuated Signal Controllers

Object Minimum Project Requirements

NTCIP 1201:1996:

moduleType Value 3 dbCreateTransaction All Values dbErrorType All Values globalDaylightSaving Values 2 & 3 maxTimeBaseScheduleEntries 255 maxDayPlans 15 maxDayPlanEvents 10 maxEventLogConfigs 255 eventConfigMode Values 2 thru 5 eventConfigAction Values 2 & 3 maxEventLogSize 255 maxEventClasses 7 maxGroupAddress 2

NTCIP 1202:1996:

maxPhases 16 phaseStartup Values 2 thru 6 phaseOptions All Values maxPhaseGroups 2 maxVehicleDetectors 32 vehicleDetectorOptions All Values maxPedestrianDetectors 8 unitAutoPedestrianClear All Values unitControlStatus All Values unitFlashStatus All Values unitControl All Values maxAlarmGroups 1 maxSpecialFunctionOutputs 8 coordCorrectionMode Values 2 thru 4 coordMaximumMode Values 2 thru 4 coordForceMode Values 2 & 3 maxPatterns 48 patternTableType Either 2 or 3 maxSplits 16 splitMode Values 2 thru 7 localFreeStatus Values 2 thru 11

TRAFFIC SAFETY DIVISION 24 – 40

Object Minimum Project Requirements maxTimebaseASCActions 255 maxPreempts 6 preemptControl All Values preemptState Values 2 thru 9 maxRings 4 maxSequences 16 maxChannels 16 channelControlType Values 2 thru 4 channelFlash All Values channelDim All Values maxChannelStatusGroups 16 maxOverlaps 8 overlapType Values 2 & 3 maxOverlapStatusGroups 8 maxPort1Addresses 255 port1Status Values 2 & 3

The controller must be able to implement all NTCIP messages called for in this

Specification without any additional vendor-specific proprietary statements.

The software must be supplied with full documentation, including a CD-ROM disc or other approved storage media containing ASCII versions of the relevant official NEMA standard MIB modules referenced by the device functionality. These must be in ASN.1 format. In addition, if the device does not support the full range of any given object within a NEMA standard MIB module, supply a manufacturer-specific version of the official

NEMA standard MIB module with the supported range indicated in ASN.1 format in the

SYNTAX field of the OBJECT-TYPE macro. The filename must be the same as the standard MIB filename, with “.man” as the extension.

The software documentation must also include a CD-ROM disc or other approved storage media containing ASCII versions of all manufacturer-specific objects supported by the device in ASN.1 format and in a manufacturer-specific MIB with accurate and meaningful

DESCRIPTION fields and supported ranges indicated in the SYNTAX field of the

OBJECT-TYPE macros.

The manufacturer may not place any restrictions on the dissemination of this documentation within the Department.

The manufacturer must provide a copy of the following table completed to describe the operation of its controller, including which objects are used and the procedures performed with these objects to implement the functions listed using NTCIP.

TRAFFIC SAFETY DIVISION 25 – 40

Table 8

Controller Operation

Function Objects Procedures to Implementation

Example: Function X Object T

Object Y

Object Z

Get object T then send objects Y and Z if T>0.

Change split time in an active coordination plan

Change ring structure

Change Min Green in an active coordination plan

Change alternate sequence in an active coordination plan

J. Flashing Yellow Arrow Operation. Provide a Flashing Yellow Arrow (FYA) routine that:

• is programmable in the controller unit,

• provides a minimum of up to 4 FYA left turn signal displays per MUTCD,

• uses data entries in the controller unit to define when the signal face displays the protected (green arrow) and the permissive (flashing yellow arrow), and

• can be programmed for permissive only, permissive-protected, or protected only operation by time of day. Transition from FYA permissive-protected operation to protected only operation must be accomplished after concurrent termination of both the FYA and the associated opposing through movement.

K. Malfunction Management Unit (MMU). This Specification sets forth the minimum requirements for a shelf-mountable, 16-channel, solid-state MMU. The MMU must meet, as a minimum, Section 4 of the NEMA Standards Publication TS 2-2003. Where differences occur, this Specification governs.

No circuit cuts are allowed on circuit boards in any of the equipment supplied. Any wire jumpers included on circuit boards must be placed in plated through-holes that are specifically designed to contain them. Jumpers tack soldered to circuit traces or added to correct board layout errors are not acceptable.

All ICs with 16 or more pins must be mounted in machine-tooled sockets or surface mounted. To eliminate solder wicking, all sockets must have two-piece, machined contacts and closed-end construction. The outer sleeve must be brass with tin or gold plating and tapered to allow easy IC insertion. The inner contact must be beryllium-copper sub-plated with nickel and plated with gold. All sockets must have thermoplastic bodies meeting UL 94V-0. Other high quality sockets may be acceptable but must have prior approval of the TRF Signal Operations Engineer. Surface-mount devices are allowed. Submit proposals for use of sockets meeting alternate specifications in writing with the bids. Zero-insertion-force sockets are not allowed.

The design must allow for removal or replacement of a circuit board without unplugging or removing other circuit boards.

TRAFFIC SAFETY DIVISION 26 – 40

One side of each board must be completely accessible for troubleshooting and testing the unit while it is still operating. This may be accomplished with extender boards or cables.

This need apply to only one circuit board at a time. If extender boards are required to meet this requirement, provide one set for every ten MMUs ordered, or portion thereof, with the order.

No more than two circuit boards may be attached to each other to constitute a circuit assembly. Attaching hardware must use captive nuts or other approved method to secure the boards together. Submit alternate methods in writing with the bids. The design must allow for testing and operation of the controller unit with the boards separated.

If this Specification is used to support the purchase of a complete controller assembly, the unused red circuits must be connected to the AC line in the controller cabinet.

Preprogram the MMU in accordance with Table 9.

Table 9

MMU Pre-Programming Requirements

Channel Load Switch Phase

Channel 1 Load Switch 1 Phase 1 Vehicle

Channel 2 Load Switch 2 Phase 2 Vehicle

Channel 3 Load Switch 3 Phase 3 Vehicle

Channel 4 Load Switch 4 Phase 4 Vehicle

Channel 5 Load Switch 5 Phase 5 Vehicle

Channel 6 Load Switch 6 Phase 6 Vehicle

Channel 7 Load Switch 7 Phase 7 Vehicle

Channel 8 Load Switch 8 Phase 8 Vehicle

Provide an MMU that displays by LCD or other approved graphics display, the active or inactive state of each circuit on all 16 channels. An icon must be used representing the red

(Don’t Walk), yellow, and green (Walk) circuit for each channel.

The MMU must be compatible with the controller and capable of monitoring FYA operation as defined by the MUTCD and still provide standard NEMA TS-2 monitoring functions.

Each MMU must have a unique serial number permanently and neatly displayed on the face of the unit. If this serial number is located elsewhere on the unit, affix an additional temporary label, neatly printed or typed, to the MMU face.

When required by the plans or bid documents, provide the MMU with an Ethernet port on the front face of the unit.

L. TS 2 Cabinet Assembly. This Specification describes the minimum acceptable requirements for a TS 2 cabinet assembly to house a NEMA TS 2 Type 1, solid-state, full-actuated controller unit. The assembly must include the cabinet, flasher, card rack or racks, an MMU, an external power supply, and six flash-transfer relays. For cabinet assemblies of configuration 4 (16 position), the assembly must include 16 load switches;

TRAFFIC SAFETY DIVISION 27 – 40

for cabinet assemblies of configuration 3 (12 position), the assembly must include 12 load switches. All cabinets must include appropriate mounting hardware.

1. Cabinet Design. The cabinet must be constructed of unpainted sheet aluminum with a minimum thickness of 3.2 mm. No wood, wood-fiber products, or other flammable material may be used in the cabinet. All welds must be neat and of uniform consistency.

The size of the cabinet must be size 5 or size 6, as defined by TS 2, Clause 7.3, of the

NEMA Standard Publication TS 2-1998, as specified by the plans. The load bay must be configuration 3 (12 position) or configuration 4 (16 position) as defined by TS 2, Clause 5.3, as specified by the plans. Provide the cabinet option shown on the plans with features and configuration in accordance with Table 10.

Table 10

Cabinet Options and Configurations

Cabinet

Options

Size of Cabinet Back Panel

Configuration

Size of Load Bay

1 Pole Mount TS 2 Size 5 3 12 position

2 Base Mount TS 2 Size 5 3 12 position

3 Base Mount TS 2 Size 6 3 12 position

4 Base Mount TS 2 Size 6 4 16 position

Attach two aluminum lifting eyes or ears to the cabinet with dual or single carriage bolts to permit lifting with a sling. The corners of each eye or ear must be rounded and in the down position when shipped.

Provide vertical shelf support channels to permit adjustment of shelf location in the field. The channels must have a single continuous slot to allow placement of shelves at any height within the cabinet. Channels with fixed notches or holes are not acceptable.

Equip each cabinet with an extra set of unistrut channels or a keyhole panel on either side of the front section of the cabinet to permit the Department to mount additional equipment as necessary.

Shelves must be at least 330 mm deep and be located in the cabinet to provide a

12.5 mm clearance between the back of the shelf and the back of the cabinet. Provide a

38 mm drawer in the cabinet, mounted directly beneath the controller support shelf. The drawer must have a hinged top cover and be capable of storing documents and miscellaneous equipment. This drawer must support 22.5 kg when fully extended and must open and close smoothly. Drawer dimensions must make maximum use of available depth offered by the controller shelf. The drawer width must be at least

600 mm.

Provide two shelves in the cabinet with a minimum height of 305 mm. There must be sufficient shelf space to accommodate a controller unit 330 mm high, an MMU, one

8-position card rack, and an external power supply. Provide an additional space at least

305 mm high, 325 mm wide, and 305 mm deep. Place the controller unit, MMU, card racks, and power supply on the shelves in such a manner that ventilation is sufficiently

TRAFFIC SAFETY DIVISION 28 – 40

provided to all components. Provide labels showing the proper placement of each component along the shelves to ensure proper placement.

Provide two thermostatically controlled fans to vent and cool the cabinet. The fans must be a commercially available model with a capacity of at least 2.7 m3/min. The thermostats must be adjustable with a range of 20–43°C. Provide a press-to-test switch for testing the operation of the fans.

Stamp a unique five-digit serial number directly on the cabinet or engrave on a metal or metalized Mylar plate epoxied or riveted with aluminum rivets to the cabinet. The digits must be at least 5 mm in height and located on the upper right sidewall of the cabinet near the front.

2. Cabinet Door. Provide the cabinet with one door in…