ESBD_570399_1792587836797_27-04 SPECS FORM.pdf

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Montgomery County Specification Download Acknowledgement

Invitation to Bid

Traffic Signal Detection Upgrades Project #27-04

SPECS

(CSJ: 0912-37-267)

VENDORS MUST IMMEDIATELY RETURN THIS FORM BY EMAIL: purchasing@mctx.org

Vendor Responsibilities o Vendors must download and complete any addenda o Vendors must submit responses in accordance with requirements stated on cover of document o Vendor must submit 1295 form with Bid/Proposal

Detailed information regarding 1295 can be found under item 39 in the attached Terms and Conditions.

Texas Ethics Commission website for 1295:

https://www.ethics.state.tx.us/filinginfo/1295/

For completing the 1295:

Contract ID: 5877 Description: Project #27-04

Montgomery County will not be responsible for inaccurate or incomplete specifications and/or addenda pertaining to any bid/proposal that is received electronically.

Legal Name of Contracting Company

Contact Person

Complete Mailing Address

Telephone Number Email Address

Signature Date mailto:purchasing@mctx.org https://www.ethics.state.tx.us/filinginfo/1295/

TABLE OF CONTENTS

INVITATION TO BID (ITB) PACKAGE CHECK LIST

SUPPLEMENTARY REQUIREMENTS FOR PROJECTS USING FEDERAL FUNDS

MONTGOMERY COUNTY SPECIFICATIONS

SCOPE OF WORK

BID FORM

TXDOT SPECIFICATIONS TRAFFIC EQUIPMENT

TXDOT STANDARD SPECIFICATIONS GENERAL REQUIREMENTS

MONTGOMERY COUNTY GENERAL TERMS AND CONDITIONS

CERTIFICATION REGARDING LOBBYING

BUILD AMERICA, BUY AMERICA ACT (BABAA) SELF-CERTIFICATION

USDOT NONDISCRIMINATION ASSURANCES - DOT ORDER NO. 1050.2A

FEDERAL HIGHWAY ADMINISTRATION – FHWA-1273

REFERENCES

VENDOR FORMS

Project 27-04 Traffic Signal Detection Upgrades

(CSJ: 0912-37-267)

COMPANY NAME

BID PACKAGE CHECK LIST

Only items marked with an “X” are applicable to this project.

Respondents should review the package thoroughly.

If additional information is needed, contact Montgomery County Purchasing Dept. at 936-539-7980.

Respondent must check each task as it is completed.

Include this form with the appropriate response documents.

Required Required

X BID FORMS

Must be completed and signed in ink. Failure to do so may cause Bid to be rejected.

X Israel Boycott Statement

Contract X Conflict of Interest Questionnaire (CIQ)

X Bid Form X Antitrust Certification Statement

X Equipment cut sheets X Child Support Certification

X Certification Regarding Lobbying X Felony Conviction Notification

X Build America, Buy America Act (BABAA) Self- Certification X Acknowledgment

X USDOT Standard Title VI/Nondiscrimination Assurances DOT Order No. 1050.2A

X References X Disclosure of Interested Parties (Form 1295) (if applicable)

X Vendor Information Form X Ethics Training* Vendor and Lobbyist completed and Certificate of Completion included with bid response

*click on link to complete training

X W-9 Submittal X

GENERAL REQUIREMENTS AND

TERMS Respondent should be familiar with all General Requirements and Terms

X Bidder/Offeror Self Certification

BID BOND REQUIREMENTS

This Bond applies to certain Bids as stated in Montgomery County Terms and Conditions.

X Disclosure of Lobbying Activities (if applicable)

X

SUBMITTING PROCEDURE

Company Name Project Number Opening Date Project Title

X Certification Regarding Debarment, Suspension, Ineligibility and Voluntary Exclusion for Covered Contracts

X Non-Collusion Affidavit and Debarment Certification

AFTER AWARD IS MADE, THE FOLLOWING DOCUMENTS MUST BE PROVIDED

Check if you are prepared to provide these after award, as required.

Required Required

TEST REPORTS X SAFETY DATA SHEETS

PERFORMANCE BOND

REQUIREMENTS This Bond applies to bids that exceed $100,000 as stated in the Montgomery County Terms and Conditions.

PAYMENT BOND REQUIREMENTS

This Bond applies to bids that exceed $25,000 as stated in the Montgomery County Terms and Conditions.

INSURANCE INFORMATION

Required Required

X

WORKERS’ COMPENSATION

Check if you are prepared to provide this after award, as required, if applicable.

X

ACTIVE VENDOR

Check here only if your company has conducted business with Montgomery County within the past year; AND all current insurance certificates are on file at this time.

X PROFESSIONAL LIABILITY

Check if you are prepared to provide this after award, as required, if applicable.

It is the Respondent’s responsibility to be thoroughly familiar with all Requirements and Specifications.

Project 27-04 Traffic Signal Detection Upgrades

(CSJ: 0912-37-267)

https://www.mctx.org/departments/departments_d_-_f/ethics_commission/online_training.php

MONTGOMERY COUNTY

Supplementary Requirements for Projects

Using federal Funds through TxDOT

Items 1L to 9L Government Requirements (included in this document) and included

Federal Requirements and Special Provisions apply to this project. Bidders are responsible for reviewing all bid documents to become familiar with related requirements.

Items 1L to 9L Local Government General Requirements Federal Requirements and

Special Provisions shall be deemed to control in the event of a conflict with any other requirements in the manual/contract documents.

No DBE or County MWBE requirements will apply for this project.

Items 1L to 9L Local Government General Requirements and Covenants:

• 1L Abbreviations

• 2L Instructions to Bidders

• 3L Award and Execution of Contract

• 4L Scope of Work

• 5L Control of the Work

• 6L Control of Materials

• 7L Legal Relations and Responsibilities

• 8L Prosecution and Progress (VOID Definition of Working Day, Use County Definition)

• 9L Measurement and Payment

Federal Requirements

• Form 1273 – Required Contract Provisions

• Contractor Certifications

• Child Support Statement

• Prohibition on certain telecommunications equipment of services

Project 27-04 Traffic Signal Detection Upgrades

(CSJ: 0912-37-267)

DNash Snapshot

Federal Special Provisions

• SP 000-001L: Nondiscrimination

• SP 000-002L: Certification of Nondiscrimination in Employment

• SP 000-007L: Cargo Preference Act requirements in federal aid contracts

• SP 002-003L: Instruction to Bidders

• SP 003-006L: Award and Execution of Contract

• SP 006-009L: Control of Materials

• SP 506-001L: Temporary Erosion, Sedimentation, and Environmental Controls

Project 27-04 Traffic Signal Detection Upgrades

MONTGOMERY COUNTY SPECIFICATIONS

FOR

TRAFFIC SIGNAL DETECTION UPGRADES

(CSJ: 0912-37-267)

SCOPE:

It is the intent of Montgomery County to secure pricing and availability for Traffic Signal Detection Equipment to be utilized by Montgomery County, Texas. This project is federally funded by the Federal Highway Administration (FHWA), Texas Department of Transportation Advanced Funding Agreement CSJ: 0912-37-267.

The communications infrastructure shown in the attached plans is intended to support future Montgomery County network integration. Except where specifically shown on the plans, installation of signal equipment, network electronics, fiber splicing, system integration, network configuration, and communications activation shall be performed by Montgomery County.

TERM OF CONTRACT:

This contract will commence upon the award by Commissioners' Court and shall continue through the earlier of the Grant period of performance end date (as may be amended from time to time) or other date shown in the Contractor’s Scope of Services (as amended from time to time), unless terminated as provided herein. All pricing must be firm during the contract.

TENTATIVE SCHEDULE OF EVENTS:

Release of BID: Wednesday, October 21, 2026 Deadline for Questions: Friday, October 30, 2026, by 2:00 p.m.

Submission Due Date: Thursday, November 12, 2026, by 2:00 p.m.

GENERAL REQUIREMENTS:

Two sets (1 original and 1 electronic copy on flash drive) of the bid shall be submitted. Original bid shall be clearly marked "ORIGINAL" and contain all original signatures.

If quantities are listed, the quantities should be considered as approximate and based on the best available information. The Vendor may not limit an order or shipment of an order with a "Minimum Dollar Amount or Quantity Amount." In reference to new product/service bids, quantity usage may be stated as one or more.

When "Extended Prices" and/or "Grand Total" are listed in the bid and there is an error in the mathematical calculations, the unit price shall govern for evaluation purposes.

Project 27-04 Traffic Signal Detection Upgrades

Specifications may reference name brands and model numbers. It is not the intent of Montgomery County to limit or restrict bids, but to establish a desired level of quality, service, and performance.

The Vendor will be responsible for damages to County property.

Usage Report: Upon request, the Vendor will provide a report of items purchased on this contract, at no charge to Montgomery County.

If applicable, Safety Data Sheets must be furnished as required to comply with the law.

Pricing must be all inclusive, with no additional charges for shipping, handling, delivery or any other charge not specifically set out and agreed to by the County.

All standard Montgomery County Terms and Conditions apply unless stated otherwise.

All orders will be issued on an “AS NEEDED” basis.

Montgomery County does not guarantee an order.

If a bidder does not wish to bid at this time but wishes to remain on the bid list for this commodity, please submit a “NO BID” following the same procedures indicated for bidding.

It is the responsibility of the bidders to monitor the Purchasing website at www.mctx.org for any addenda that may be issued pertaining to this bid.

No addendum will be issued three (3) days prior to bid opening date unless otherwise approved by the Purchasing Agent.

Montgomery County reserves the right, at its discretion, to procure the awarded item(s)/service(s) from other sources, if it is found to be in the County’s best interest.

If applicable, contracts will not be awarded to any party that has been debarred, suspended, excluded or ineligible for participation in federal assistance programs.

If applicable, in the event an awarded party or their subcontractor(s) become debarred, suspended, excluded or ineligible for participation in federal assistance programs after award of contract, the awarded contract shall be cancelled without notice.

EVALUATION:

Compliance with all bid requirements, delivery, pricing, warranty, work history and the needs of the using department will be considered when evaluating bids.

Montgomery County reserves the right to award multiple contracts to ensure an uninterrupted source of service.

Project 27-04 Traffic Signal Detection Upgrades

(CSJ: 0912-37-267)

http://www.mctx.org/

SPECIFICATIONS (SCOPE OF WORK)

The purpose of this project is to enhance traffic signal operations throughout Montgomery County by upgrading existing traffic signal detection systems with modern detection technology capable of supporting countywide traffic management and signal system integration.

Many of the existing traffic signals currently operate using legacy detection equipment that provides limited functionality and operational flexibility. The proposed upgrades are intended to:

• Improve vehicle detection accuracy and reliability.

• Enhance traffic signal performance and efficiency.

• Support integration of detection data into Montgomery County's transportation management and operations platform.

• Improve the County's ability to monitor and manage signal operations across the transportation network.

• Reduce maintenance issues associated with aging detection infrastructure.

• Provide a scalable platform for future intelligent transportation system (ITS) deployments and corridor-wide signal management initiatives.

The County has determined that these improvements are necessary to improve traffic operations, maintain system reliability, and support continued deployment of advanced transportation management technologies throughout the County.

Project 27-04 Traffic Signal Detection Upgrades

GROUND MOUNTED CABINET (BRAND-NEUTRAL)

Cabinet Overview

The Advanced Transportation Controller (ATC) Signal Cabinet shall be a modular, rack-mounted traffic signal cabinet system designed to house ATC-compliant control, monitoring, power, and input/output equipment. The cabinet shall function as an integrated platform supporting traffic signal operations, monitoring, diagnostics, communications, and future expandability.

The cabinet and all internal assemblies shall be designed and furnished as a complete, fully functional system, capable of supporting traffic signal operation under normal conditions, flash operation, and maintenance activities in accordance with applicable ATC and NEMA standards.

The cabinet shall be designed to accept interchangeable, modular subassemblies, mounted within standard 19-inch EIA racks, allowing for equipment replacement, expansion, or reconfiguration without requiring cabinet replacement. All assemblies shall be readily accessible and removable using common hand tools, without disturbing unrelated components.

The cabinet architecture shall support continued flashing operation while selected internal subassemblies (including the controller unit, input assemblies, output assemblies, cabinet monitor unit, or power supply) are removed or replaced, to maintain traffic safety during maintenance activities.

The cabinet shall provide:

• Structural, environmental, and electrical protection for all installed equipment

• Organized power distribution and signal routing between assemblies

• Serial and/or Ethernet communications paths between assemblies and the controller unit

• Field termination points for signal outputs, detector inputs, and auxiliary devices

• Provisions for monitoring system health, fault detection, and diagnostic reporting

The cabinet shall be suitable for installation at signalized intersections and shall be constructed to withstand the environmental conditions associated with roadside deployment, including temperature extremes, humidity, vibration, and dust exposure.

The cabinet shall incorporate a police/service control panel providing limited operational access for field personnel, including signal power control and flash/auto operation, without direct access to internal control electronics.

The ATC Signal Cabinet shall be designed to support future expansion, including additional input/output capacity, communications equipment, and emerging traffic management technologies, without structural modification to the cabinet enclosure.

The cabinet shall be furnished with a D4 controller, such as McCain ATC eX2 or approved equal. The cabinet system, controller, communications components, and all associated hardware and software shall be fully compatible with Montgomery County’s MyCity platform, Opticom priority/preemption systems, safety applications, analytics applications, and ancillary equipment. The system shall provide a fully integrated

Project 27-04 Traffic Signal Detection Upgrades solution in which traffic signal operations, safety functionality, analytics functionality, and Opticom functionality operate within a unified platform without requiring separate standalone field processors or independent subsystem controllers.

Cabinet Enclosure Requirements

1. General The ATC Signal Cabinet enclosure shall be a self-contained, freestanding roadside cabinet designed to house all required traffic signal control equipment and associated assemblies. The enclosure shall provide structural integrity, environmental protection, and secure access for authorized personnel while supporting safe operation and maintenance of the traffic signal system.

The cabinet enclosure shall be designed for outdoor roadside installation and shall be capable of continuous service under typical urban and suburban traffic signal operating conditions.

2. Construction and Materials The cabinet enclosure shall be constructed of corrosion-resistant metal, suitable for long-term outdoor use.

• The cabinet body, doors, and structural members shall be fabricated from aluminum or equivalent corrosion-resistant material.

• Minimum material thickness shall be sufficient to provide rigidity, resist deformation, and protect internal equipment during normal handling, transport, installation, and service.

• All exterior seams shall be continuously welded or otherwise sealed to prevent water intrusion.

• All edges and corners shall be rounded or deburred to eliminate sharp surfaces.

Fasteners, hinges, latches, and hardware exposed to the environment shall be fabricated from stainless steel or equivalent corrosion-resistant material.

3. Cabinet Configuration and Access The enclosure shall provide front and rear access doors, unless otherwise noted on the plans.

• Doors shall be full-height and provide unobstructed access to installed equipment.

• Doors shall be hinged to allow opening to at least 90 degrees.

• Door construction shall be reinforced to prevent sagging or misalignment over the life of the cabinet.

The cabinet shall include provisions for internal rack mounting, consistent with 19-inch EIA standards, to securely support all internal assemblies.

4. Doors, Locks, and Security

Project 27-04 Traffic Signal Detection Upgrades

Each cabinet door shall be equipped with a multi-point latching system to ensure a uniform weather-tight seal around the perimeter of the door.

• Latches shall include provision for padlocking.

• Cabinet locks shall be electronic Bluetooth-enabled locks capable of secure wireless access management.

• Electronic locks shall be compatible with the Owner’s designated access control and credential management system.

• Locks shall provide audit trail capability documenting access events, including date, time, and user credentials where supported by the system.

• A mechanical override key shall be provided for emergency access.

• Locks shall be tamper-resistant and suitable for outdoor use.

A police/service access panel shall be provided as part of the enclosure, allowing limited operational control without opening the main cabinet doors. The police panel shall be separately lockable and weather-sealed.

5. Gasketing and Environmental Sealing All cabinet openings, including doors and access panels, shall be provided with continuous gasketing.

• Gaskets shall be closed-cell neoprene, silicone, or equivalent material.

• Gasketing shall be permanently bonded or mechanically retained to prevent displacement.

• The enclosure shall be dust-tight and resistant to rainwater intrusion when doors are closed and latched.

The cabinet top shall be designed to prevent standing water accumulation.

6. Ventilation and Thermal Management The enclosure shall include a ventilation system designed to maintain acceptable internal operating temperatures for all electronic equipment.

• Ventilation shall include filtered air intake and exhaust openings.

• Filters shall be removable, reusable, and accessible without removing internal equipment.

• Ventilation may be thermostatically controlled and shall operate automatically as required.

Ventilation openings shall be designed to prevent the entry of insects, debris, and wind-driven rain.

7. Interior Features The cabinet interior shall include the following features:

• Cabinet lighting: LED interior lighting actuated by door switches and provided with a manual override.

• Wire management: Integrated wire raceways or cable management features to promote organized internal wiring and clear separation between power, signal, and communication conductors.

Project 27-04 Traffic Signal Detection Upgrades

• Grounding provisions: A bonded cabinet ground bar or equivalent grounding system to accommodate equipment grounding and field grounding connections.

All interior surfaces shall be finished to resist corrosion and facilitate cleaning and maintenance.

8. Mounting and Installation Provisions The cabinet enclosure shall be provided with:

• Base mounting provisions compatible with standard concrete foundations or anchoring systems.

• Lifting or handling provisions to enable safe placement during installation.

• Sufficient internal clearance to accommodate all specified assemblies and associated wiring without crowding.

9. Identification and Labeling The cabinet enclosure shall include permanent identification labels or nameplates indicating:

• Cabinet type

• Voltage rating

• Applicable standards compliance

Labels shall be weather-resistant and legible for the life of the cabinet.

Internal Assemblies – General Requirements

1. General The ATC Signal Cabinet shall contain a complete set of modular internal assemblies necessary for traffic signal control, monitoring, power distribution, communications, and field interfacing. All assemblies shall be designed to operate together as an integrated system in accordance with applicable ATC and NEMA standards.

Internal assemblies shall be rack-mounted or otherwise securely installed within the cabinet enclosure and arranged to promote safe operation, ease of maintenance, and future expandability.

2. Modularity and Accessibility All internal assemblies shall be modular and removable.

• Assemblies shall be mounted in standard 19-inch EIA racks or approved equivalent mounting systems.

• Each assembly shall be removable independently without requiring removal of unrelated assemblies.

• Removal and replacement of assemblies shall be accomplished using common hand tools.

• No permanent wiring connections shall be required for normal assembly replacement; all interconnections shall be made using plug-and-socket connectors or equivalent means.

Project 27-04 Traffic Signal Detection Upgrades

The cabinet shall be arranged such that routine maintenance, troubleshooting, and component replacement can be performed safely and efficiently.

3. Operational Continuity During Maintenance The cabinet architecture shall support continued flashing operation while selected internal assemblies are removed or replaced for maintenance or testing purposes.

At a minimum, removal of the following assemblies shall not prevent the cabinet from operating in flash mode:

• Controller unit

• Input assembly

• Output assembly

• Cabinet monitor unit

• Cabinet power supply

This requirement is intended to maintain traffic safety during maintenance activities.

4. Required Internal Assemblies Unless otherwise shown on the plans, the cabinet shall include provisions for the following internal assemblies:

• Service Assembly

• Controller Unit

• Input Assembly

• Output Assembly

• Cabinet Monitor Unit (CMU)

• Cabinet Power Supply

• Battery Backup / UPS Assembly

• Serial Communications Assembly

• Field Input Termination Assembly

• Field Output Termination Assembly

Each assembly shall perform its intended function in accordance with applicable standards and shall be compatible with all other assemblies installed in the cabinet.

5. Power Distribution and Electrical Separation Internal assemblies shall be supplied by a central cabinet power distribution system.

• Power distribution shall be organized to provide appropriate voltages to each assembly.

• Power circuits shall be protected by circuit breakers, fuses, or equivalent protective devices.

• Electrical separation shall be maintained between:

o High-voltage AC power o Low-voltage DC power o Logic and communications circuits

Project 27-04 Traffic Signal Detection Upgrades

Assemblies operating at different voltage levels shall be physically arranged and wired to minimize electrical interference and facilitate safe access.

6. Communications Between Assemblies The cabinet shall provide internal communications paths between assemblies to support signal control, monitoring, diagnostics, and data exchange.

• Communications may include serial buses and/or Ethernet connections, as required by the system design.

• Inter-assembly communications wiring shall be organized, clearly labeled, and mechanically protected.

• Communications connections shall be made through standardized connectors to facilitate assembly replacement and future upgrades.

7. Wiring and Cable Management Internal wiring shall be installed in a neat, organized, and workmanlike manner.

• Wiring shall be routed using integrated raceways, wire ducts, or cable management features provided within the cabinet.

• Wiring shall be adequately supported and protected from abrasion or mechanical damage.

• Color coding and labeling shall be provided to clearly identify circuit functions, voltage levels, and destination assemblies.

No loose or unsupported wiring shall be permitted.

8. Identification and Labeling Each internal assembly shall be clearly and permanently labeled to identify:

• Assembly function

• Voltage or power requirements (as applicable)

• Interface or connection points

Labels shall be legible when assemblies are installed and shall remain visible during normal maintenance activities.

9. Expandability and Future Use The internal cabinet layout shall allow for future expansion, including:

• Additional input or output capacity

• Additional communication equipment

• Additional monitoring or data collection assemblies

Unused positions, connectors, or termination points shall be clearly identified and reserved for future use where practical.

Project 27-04 Traffic Signal Detection Upgrades

Controller Unit

1. General The Controller Unit shall be a D4 traffic signal controller suitable for operation within the ATC Signal Cabinet. The controller shall be compatible with the cabinet architecture, internal communications assemblies, Cabinet Monitor Unit (CMU), input assemblies, output assemblies, and field termination assemblies.

The controller shall be McCain ATC eX2 or approved equal.

2. System Compatibility and Integration The controller shall support required signal operations, communications, monitoring, diagnostics, and agency-required configuration functions necessary for integration with the Owner’s existing traffic signal system.

The Controller Unit shall be fully compatible with Montgomery County’s MyCity system and associated ancillary equipment.

The Controller Unit shall support integration with Opticom emergency vehicle preemption and priority systems, safety applications, analytics applications, and other agency-approved intelligent transportation system components.

The system shall provide a unified platform in which traffic signal control, analytics, safety functions, and Opticom functionality operate through a common controller and software environment.

The use of independent standalone devices requiring separate controllers, processors, or management platforms for analytics, safety, or Opticom functionality shall not be permitted unless specifically approved by the Owner.

3. Submittal Requirements The Contractor shall submit controller product data, configuration information, compatibility documentation, and any required integration information demonstrating compliance with the specified D4 controller and MyCity compatibility requirements.

Service Assembly

1. General The Service Assembly shall provide the primary interface between incoming utility power and the internal cabinet assemblies, and shall supply protected power, grounding, surge protection, and service conveniences necessary for safe operation, testing, and maintenance of the traffic signal system.

The Service Assembly shall be designed to function as an integral internal cabinet subsystem and shall operate independently of the controller unit and other functional assemblies, except as required for normal power distribution.

2. Utility Power Interface

Project 27-04 Traffic Signal Detection Upgrades

The Service Assembly shall include provisions for connection of incoming utility power to the cabinet.

• Utility power shall be routed through the Service Assembly prior to distribution to other internal assemblies.

• Power conductors shall be securely terminated using UL-listed terminals or equivalent.

• Means shall be provided to disconnect or isolate cabinet power for maintenance and emergency response.

All utility power components shall be clearly identified and appropriately labeled.

3. Power Distribution and Protection The Service Assembly shall include power distribution and protection devices to support internal cabinet assemblies.

• Branch circuits shall be protected by circuit breakers, fuses, or equivalent protective devices.

• Protective devices shall be sized to protect wiring and connected equipment while allowing normal operation.

• Circuit breakers and switches shall be readily accessible when cabinet doors are open.

• Protective devices shall be provided with guards or covers as necessary to prevent accidental operation.

Power distribution shall be arranged to maintain separation between service power, signal power, and low-voltage power circuits.

4. Convenience Power and Receptacles The Service Assembly shall include convenience power outlets for maintenance and testing purposes.

• At least one grounded convenience receptacle shall be provided within the cabinet.

• Receptacles shall be protected by ground-fault circuit interruption (GFCI) where required.

• Convenience outlets shall be supplied from the Service Assembly and shall not interfere with normal signal operation.

Convenience power shall remain available when practicable during cabinet maintenance activities.

5. Surge Protection and Noise Suppression The Service Assembly shall include surge protection and filtering devices to protect internal equipment from electrical transients, spikes, and noise.

• Surge protection shall be installed on incoming utility power prior to distribution.

• Surge protection devices shall be rated for continuous service and shall be replaceable.

Project 27-04 Traffic Signal Detection Upgrades

• Filtering shall reduce conducted electrical noise that could interfere with cabinet electronics or communications.

Failure indicators or monitoring features shall be provided where practical to identify degraded or failed surge protection devices.

6. Grounding and Bonding The Service Assembly shall include grounding and bonding provisions for the cabinet and all internal assemblies.

• A cabinet ground bar or equivalent grounding system shall be provided.

• All internal assemblies shall be bonded to the cabinet grounding system.

• Provisions shall be provided for connection to the site grounding electrode system.

Grounding conductors shall be sized and installed in accordance with applicable codes and standards.

7. Internal Controls and Indicators The Service Assembly shall include controls and indicators necessary for service and maintenance operations.

• Power status indicators shall be provided to show the presence of incoming utility power.

• Switches or disconnect devices shall be clearly labeled to indicate their function.

• Indicators and controls shall be visible and accessible without removing internal assemblies.

8. Mechanical Integration and Accessibility The Service Assembly shall be mounted within the cabinet to allow safe access for maintenance personnel.

• Components shall be arranged to avoid obstruction of access to other assemblies.

• The Service Assembly shall be removable or serviceable without disturbing unrelated assemblies.

• Wiring associated with the Service Assembly shall be neatly routed and mechanically protected.

9. Identification and Labeling All components of the Service Assembly shall be permanently labeled, including:

• Power input connections

• Circuit breakers or fuses

• Convenience outlets

• Grounding points

Labels shall be legible during normal maintenance conditions and resistant to fading or degradation.

Project 27-04 Traffic Signal Detection Upgrades

Input Assembly

The Input Assembly shall provide the interface between field input devices and the traffic signal control system. The Input Assembly shall receive, condition, and transmit input signals necessary for traffic signal operation, detection, preemption, monitoring, and auxiliary functions.

The Input Assembly shall be a modular internal cabinet assembly designed for ease of maintenance, replacement, and future expansion.

2. Functional Requirements The Input Assembly shall be capable of supporting input signals from field devices, including but not limited to:

• Vehicle detection devices

• Pedestrian detection devices

• Emergency vehicle preemption equipment, including Opticom systems

• Railroad preemption interfaces

• Transit signal priority or priority request devices

• Connected vehicle, safety, and analytics data inputs as required by the agency

• Auxiliary or agency-specified input sources

The Input Assembly shall reliably transmit input status information to the controller unit and monitoring systems as required for normal signal operation.

3. Modularity and Configuration The Input Assembly shall be modular and rack-mounted or shelf-mounted within the cabinet.

• Input modules shall be removable and replaceable without disturbing unrelated assemblies.

• Modules shall be hot-swappable where permitted by applicable standards.

• The Input Assembly shall be configurable to support varying quantities and types of input devices as shown on the plans.

The cabinet shall provide sufficient physical capacity to accommodate current and anticipated future input needs.

4. Compatibility and Standards The Input Assembly shall be compatible with ATC-compliant controller units and shall support industry-standard detector and input interfaces.

• Input modules shall be compatible with standard 2-channel and 4-channel detector form factors where applicable.

• The Input Assembly shall support both presence and pulse-type input signals.

• Input signal levels and isolation shall be appropriate for connection to field devices used in traffic signal applications.

All interfaces shall comply with applicable ATC and NEMA standards.

Project 27-04 Traffic Signal Detection Upgrades

5. Electrical Characteristics and Isolation Input circuits shall be designed to protect cabinet electronics and ensure reliable operation.

• Input circuits shall include appropriate electrical isolation to protect against voltage transients and noise.

• Input circuits shall not adversely affect other cabinet systems.

• Signal conditioning shall be provided as necessary to ensure accurate detection and reporting of field input states.

Low-voltage input circuits shall be electrically separated from high-voltage circuits within the cabinet.

6. Communication With Other Assemblies The Input Assembly shall communicate input status information to the controller unit and other relevant assemblies through internal cabinet communication interfaces.

• Communication paths shall be clearly defined and organized.

• Interfaces shall use standardized connectors to facilitate assembly replacement.

• Communication wiring shall be routed and protected to prevent damage or signal interference.

7. Surge Protection and Input Protection The Input Assembly shall include provisions for protecting input circuits from surges, lightning, and other electrical disturbances originating from the field.

• Input protection devices shall be installed as appropriate for the connected devices.

• Protection components shall be replaceable without removal of the entire Input Assembly.

• Failure of an input protection device shall not disable unrelated inputs.

8. Identification and Labeling Each input position and associated connection point shall be clearly labeled.

• Labels shall identify channel or input numbers and associated functions.

• Labeling shall be legible with the cabinet doors open and input modules installed.

• Labels shall be permanent and resistant to fading.

9. Maintenance and Accessibility The Input Assembly shall be accessible for inspection, testing, and maintenance.

• Input modules shall be reachable without removing other cabinet assemblies.

• Diagnostic indicators or test features shall be provided where practical to assist with troubleshooting.

• The Input Assembly shall be serviceable without interrupting cabinet flash operation.

10. Expandability The Input Assembly shall be designed to support future expansion.

Project 27-04 Traffic Signal Detection Upgrades

• Unused input positions may be provided or reserved for future use.

• The cabinet layout shall allow additional input capacity to be added without structural modification to the enclosure.

Output Assembly

1. General The Output Assembly shall provide the interface between the traffic signal control system and the field signal indications. The Output Assembly shall switch, monitor, and route signal power to the field in accordance with controller commands and cabinet monitoring requirements.

The Output Assembly shall be a modular internal cabinet assembly, designed for safe, reliable operation, ease of maintenance, and future expansion.

2. Functional Requirements The Output Assembly shall be capable of controlling signal indications for all approaches and movements shown on the plans.

• The Output Assembly shall support a minimum of six outputs per signalized channel (red, yellow, and green per channel configuration), unless otherwise shown.

• Outputs shall be suitable for operation with modern LED signal indications and other low-power loads commonly used in traffic signal installations.

• Output circuits shall respond to controller commands to place signal indications in the appropriate on, off, or flashing states.

The Output Assembly shall operate in coordination with the Cabinet Monitor Unit (CMU) to support safe signal operation and fault response.

3. Modularity and Configuration The Output Assembly shall be modular and rack-mounted or shelf-mounted within the cabinet.

• Output modules shall be removable and replaceable without disturbing unrelated assemblies.

• Modules shall be arranged so that expansion of output capacity can be accomplished by adding additional modules where cabinet space permits.

• The assembly shall support configurations of varying channel counts as required by the intersection design.

4. Switching Technology The Output Assembly shall utilize solid-state switching technology or equivalent non-mechanical switching devices.

• Switches shall be rated for continuous operation at the signal voltages used.

• Outputs shall be capable of handling both steady and flashing signal operation.

Project 27-04 Traffic Signal Detection Upgrades

• Switching devices shall be protected against over-current and electrical faults associated with field wiring and signal loads.

Mechanical relays shall not be used for normal signal indication switching except where required for flash transfer or similar safety functions.

5. Flash Operation and Transfer The Output Assembly shall support automatic flash operation as required during cabinet fault conditions, power irregularities, or manual flash selection.

• The assembly shall include provisions to transfer signal outputs between normal control and flash operation.

• Flash operation shall be compatible with cabinet monitoring logic and police/service controls.

• Flash color selection (red or yellow) shall be configurable on a per-channel basis as required by agency standards.

Flash operation shall be operable independently of the controller unit.

6. Monitoring and Feedback The Output Assembly shall provide output status and monitoring information to the Cabinet Monitor Unit.

• Output voltage and/or current sensing shall be provided to support detection of load failures, stuck outputs, or conflicting indications.

• Monitoring circuits shall not adversely affect normal signal operation.

• Failure or removal of a monitoring component shall not disable unrelated output channels.

Monitoring features shall support diagnostics, fault reporting, and maintenance activities.

7. Electrical Protection and Isolation Each output circuit shall include appropriate protection measures.

• Output circuits shall be protected against short circuits, overloads, and transient voltages.

• Electrical isolation shall be maintained between control logic and field signal power.

• Protection devices shall be replaceable without removal of the entire Output Assembly.

8. Field Interface and Termination The Output Assembly shall interface with the Field Output Termination Assembly for connection to field signal wiring.

• Output connections shall be clearly identified by channel number and signal color.

• Termination methods shall provide secure, vibration-resistant connections.

• Field connections shall be arranged to minimize wiring congestion and facilitate troubleshooting.

Project 27-04 Traffic Signal Detection Upgrades

9. Maintenance and Accessibility The Output Assembly shall be accessible for inspection, testing, and maintenance.

• Output modules shall be visible and reachable with cabinet doors open.

• Diagnostic indicators or test points shall be provided where practical.

• The Output Assembly shall be serviceable without preventing cabinet operation in flash mode.

10. Identification and Labeling The Output Assembly and its components shall be clearly and permanently labeled.

• Labels shall identify channel numbers, output functions, and signal colors.

• Labeling shall remain legible when modules are installed and during normal maintenance activities.

11. Expandability and Future Use The Output Assembly shall be designed to accommodate future expansion.

• Additional output capacity shall be achievable without structural modification to the cabinet.

• Unused positions or connectors shall be clearly identified for future use where practical.

Cabinet Monitor Unit (CMU)

1. General The Cabinet Monitor Unit (CMU) shall provide continuous monitoring and fail-safe protection of the traffic signal cabinet output functions. The CMU shall independently evaluate signal indications, cabinet power conditions, communications status, and internal assembly health to ensure safe and compliant traffic signal operation.

The CMU shall be a dedicated, modular internal cabinet assembly, operating independently of the controller unit to detect fault conditions and initiate appropriate response actions.

2. Functional Role The CMU shall serve as the primary cabinet safety monitoring device and shall:

• Monitor the status of signal outputs and associated field conditions

• Detect conflicting or unsafe signal indications

• Monitor cabinet power supply conditions

• Supervise communication between cabinet assemblies

• Initiate placement of the cabinet into flash operation upon detection of defined fault conditions The CMU shall not rely on the controller unit for fault detection or safety-critical response.

Project 27-04 Traffic Signal Detection Upgrades

3. Monitoring Capabilities At a minimum, the CMU shall be capable of monitoring the following conditions, as applicable to the cabinet configuration:

• Conflicting signal indications on opposing or incompatible channels

• Loss of signal output voltage or load current where a signal indication is commanded active

• Multiple or simultaneous signal indications on a single channel where not permitted

• Cabinet power supply status and voltage levels

• Communications integrity between the CMU and output assemblies

• Flash operation status and signal transfer state

The CMU shall evaluate monitored conditions continuously during cabinet operation.

4. Fail-Safe Operation and Flash Control Upon detection of a fault condition requiring protective action, the CMU shall initiate transfer of the cabinet to flash operation.

• Flash initiation shall be independent of the controller unit.

• Flash operation shall persist for a minimum duration sufficient to ensure traffic safety.

• Flash recovery shall occur only when fault conditions are cleared and recovery requirements are satisfied.

The CMU shall support both automatic and manually initiated flash operation as required by the cabinet design.

5. Fault Classification and Recovery The CMU shall distinguish between fault conditions that require:

• Immediate flash operation

• Latched fault conditions requiring manual or controlled reset

• Non-latched faults that may clear automatically once conditions normalize

The CMU shall be capable of recording or retaining fault status information to support troubleshooting and maintenance.

6. Communications and Interfaces The CMU shall communicate with other internal cabinet assemblies through dedicated internal communication interfaces.

• Communication between the CMU and output assemblies shall support monitoring and control functions.

• Loss of required communication shall be treated as a reportable or actionable condition.

• Communication interfaces shall use standardized connectors and wiring methods to facilitate replacement and expansion.

The CMU shall not depend on external communications for safety-critical operation.

Project 27-04 Traffic Signal Detection Upgrades

7. Electrical Characteristics and Power The CMU shall be powered from the cabinet power distribution system.

• Power requirements shall be compatible with cabinet power supply outputs.

• The CMU shall include protection against abnormal input voltages.

• Loss or degradation of CMU power shall result in a known, safe cabinet operating state.

The CMU shall resume normal monitoring operation following restoration of acceptable power conditions.

8. Indicators and Diagnostics The CMU shall include visual diagnostic indicators to assist maintenance personnel.

• Indicators shall display overall operational status and fault conditions.

• Diagnostic indicators shall be visible with cabinet doors open.

• Indicators shall be labeled to clearly indicate their function.

Where practical, the CMU may support additional diagnostic access through local interfaces for testing or configuration.

9. Modularity and Maintenance The CMU shall be modular and removable.

• The CMU shall be replaceable without disturbing unrelated cabinet assemblies.

• Removal or replacement of the CMU shall not prevent the cabinet from operating in flash mode.

• The CMU shall be accessible for inspection, testing, and replacement with cabinet doors open.

10. Identification and Labeling The CMU shall be permanently labeled to identify:

• Assembly function

• Power requirements

• Interface connections

Labeling shall remain visible and legible when the CMU is installed under normal operating conditions.

11. Compatibility and Expandability The CMU shall be compatible with the cabinet’s configured input, output, and power assemblies.

• The CMU shall support current and future cabinet configurations within the physical limits of the enclosure.

• Expansion or modification of other cabinet assemblies shall not require replacement of the CMU, provided applicable standards are maintained.

Project 27-04 Traffic Signal Detection Upgrades

Cabinet Power Supply

The Cabinet Power Supply shall provide regulated, reliable electrical power necessary for operation of all internal cabinet assemblies, including the controller unit, input assemblies, output assemblies, Cabinet Monitor Unit (CMU), communications equipment, and auxiliary devices.

The power supply shall be a dedicated internal cabinet assembly, designed for continuous service in a roadside traffic signal environment and compatible with the modular cabinet architecture.

2. Functional Requirements The Cabinet Power Supply shall:

• Convert incoming utility power to required DC voltage levels for cabinet operation

• Provide stable, regulated output under varying load conditions

• Support safe cabinet operation during normal conditions, flash operation, and recovery from power interruptions

• Supply power independently of the controller unit’s operational state

The power supply shall support simultaneous operation of all required cabinet assemblies without degradation of performance.

3. Input Power The Cabinet Power Supply shall be designed to operate from standard utility power as provided by the Service Assembly.

• Input power characteristics shall be compatible with the cabinet service voltage and frequency.

• The power supply shall tolerate normal variations in utility voltage without loss of regulation.

• Inrush current shall be limited to prevent nuisance tripping of upstream protective devices.

4. Output Voltages The Cabinet Power Supply shall provide the following isolated DC output voltages, as required by the cabinet configuration:

• 48 VDC for cabinet monitoring, control, and auxiliary functions

• 24 VDC for logic, detection, and control circuitry

• 12 VDC output may be provided where required by cabinet equipment or accessories Each output shall be regulated within acceptable tolerances and capable of supplying sufficient current to meet the connected load requirements.

5. Electrical Isolation and Protection The Cabinet Power Supply shall provide electrical isolation between:

• AC input and DC outputs

Project 27-04 Traffic Signal Detection Upgrades

• Individual DC output circuits Protection features shall include:

• Over-current protection

• Over-voltage protection

• Short-circuit protection

Protective features shall be designed to prevent damage to connected assemblies and to place the cabinet into a known safe operating state if abnormal conditions occur.

6. Performance Characteristics The Cabinet Power Supply shall exhibit the following performance characteristics:

• Stable output voltage regulation across the full operating load range

• Minimal output ripple suitable for electronic control and monitoring equipment

• Sufficient hold-up time to ride through brief power disturbances

The power supply shall resume normal regulated output following restoration of input power without requiring manual intervention.

7. Indicators and Test Provisions The Cabinet Power Supply shall include visible status indicators to assist maintenance personnel.

• Indicators shall show the presence and status of each DC output.

• Indicators shall be visible with cabinet doors open.

• Indicators shall be clearly labeled to identify the corresponding voltage or function.

Where practical, test points or terminals shall be provided to allow verification of output voltages during maintenance activities.

8. Integration With Monitoring Systems The Cabinet Power Supply shall interface with the Cabinet Monitor Unit (CMU) or other monitoring systems as required.

• Power supply status may be monitored for under-voltage or failure conditions.

• Power supply faults shall be capable of initiating cabinet protective responses when required.

Loss or degradation of power supply output shall be detectable by the cabinet monitoring logic.

9. Modularity and Maintenance The Cabinet Power Supply shall be modular and replaceable.

• The power supply shall be removable without disturbing…