Attachment X.pdf

SPECIAL PROVISIONS CONTRACT NO. [Contract Number]

104.00 � ADVISORY VARIABLE SPEED (AVS) TRAILER 1 of 5

10/28/2025

CATEGORY 100

PRELIMINARY

SECTION 104.00 � ADVISORY VARIABLE SPEED (AVS) TRAILER

104.00.01 DESCRIPTION

Furnish a portable, self-contained Advisory Variable Speed (AVS) trailer. The AVS trailer will support changing the advisory speed as part of a pilot program deployed on I-695 for a duration of up to 3 weeks. It is anticipated that three (3) AVS trailers will be deployed as a system and display different advisory speeds approaching the work zone. The AVS shall be deployed with vendor supplied management software.

The AVS�s Vendor software will be integrated with software including an algorithm developed by the University of Maryland (UMD). The UMD software and algorithm will collect data by drones, process the data via an algorithm, and use the output of the algorithm to change the advisory speed.

Provide the Administration�s representatives and the University of Maryland with access to the

AVS management software that allows it to connect to the University of Maryland software and algorithm to the AVS. The access will allow for the University of Maryland software and algorithm to change the advisory speed on the AVS sign.

Provide technical support to the Administration�s representatives and the University of Maryland during the duration of the pilot including, but not limited to, establishment of an interface control to facilitate communication between the AVS management software and the University of

Maryland software and algorithm.

104.00.02 MATERIALS

The AVS unit shall include the trailer, structural support system, sign panel assembly, lift mechanism, power supplies, communications, trailer mounted sign controller, and ancillary equipment. All materials for the AVS trailer shall be like new, corrosion resistant, and unaffected by water spray, salt, oil, gasoline, and all other contaminants in the quantities typically found along the edge of a traveled roadway. Construction, materials, and operation shall be in accordance with

NFPA, UL, and NEC.

104.00.02.01 Equipment.

(a) Advisory Variable Speed (AVS) Sign. The AVS sign shall be sized 48� x 60� and it shall consist of a static and dynamic display.

(1) Static The static portion of the sign shall have a black ADVISORY SPEED legend and border on a fluorescent yellow background with 8 in. Standard Alphabet font as shown in the detail below. The sign face shall be reflectorized with legend and background colors matching the Maryland Standard Sign Book.

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(2) Dynamic. The format of the message to be displayed on the Changeable Message Sign

(CMS) portion of the sign shall be XX where XX is the advisory speed in miles per hour (mph). The color of the changeable message legend shall be a yellow (amber) luminous legend on a black opaque background. The LED number height shall be

18 in. The width of the numbers shall be similar to the Series E Standard Alphabet font. The CMS shall produce brightness greater than 10,000 candela per square meter at maximum intensity. The housing for the dynamic components shall be a minimum

NEMA (National Electrical Manufacturers Association) 3R rated. The display shall adjust automatically for ambient or operational light conditions. The CMS display may use a full or discrete matrix display. If discrete matrix display is used, each character shall be displayed using a minimum of a 5 column by 7 row array with at least two array modules per line. If a full matrix display is used, the sign shall have a pixel arrangement of at least 5 columns by 7 rows per character with at least three LEDs per pixel. The CMS shall conform to ITE specifications for amber color regulatory applications. The CMS shall provide full illumination within at least a 24 degree cone perpendicular to the sign face. The operating temperature range of the LED shall be -

30 F to 125 F.

(b) Trailer. The trailer shall be painted orange and in accordance with Maryland Motor

Vehicle Law governing trailers. When deployed, the mounting height to the bottom of the advisory speed sign display shall be a minimum of 7 ft from near edge of traveled roadway in accordance with the MdMUTCD.

(c) Lift Mechanism.

(1) The lift mechanism shall be installed such that the sign panel can be raised and lowered.

(2) A corrosion resistant safety bolt or pin shall be provided to prevent the sign panel from lowering once in the raised position. A self-locking mechanism shall be incorporated into the safety bolt or pin to prevent it from being inadvertently dislodged.

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(d) Electrical Connections and Gauges.

(1) All wiring from power sources to AVS trailer equipment shall use locking cable connectors.

(2) Volt and amp gauges shall be provided for DC.

(3) Standard negative ground system shall be tied to the sign chassis.

(e) Power Supply. The AVS trailer shall operate from a solar powered electrical system consisting of battery power and solar array panels. The electrical system shall be capable of supporting continuous operation of the system for 21 consecutive days without an auxiliary charge, and be capable of being charged by a generator or other commercially available power source in case of malfunction, damage, or failure of the primary solar powered electrical system.

(f) Controller Requirements. The controller shall be capable of the following.

(1) Driving the AVS trailer operating over a -30 F to 125 F range and in a 20 percent to

95 percent noncondensing humidity range.

(2) Designed for fail-safe prevention of improper information display in the case of a system malfunction.

(3) Monitoring and displaying the battery output voltage and solar array actives (charging and discharging).

(4) Monitoring and displaying the status of the photocell and adjusting the sign illumination to match the ambient light conditions. The controller shall have at least nine levels of dimming from 10 percent to 100 percent brightness.

(5) Being contained in a sheet metal or high-density polyethylene (HDPE), weatherproof cabinet located on the controller housing and insulated to protect against excessive vibration and temperature. The cabinet shall be equipped with a lockable door with hasp/lock setup installed in a manner to maximize its effectiveness in stopping unauthorized access to the controls. Other physical locking devices may be approved by the Engineer. The cabinet shall have an interior cabinet light or backlit controller display.

(6) Modifying the sign message locally at the unit and remotely via cellular connection and an internet accessible interface.

(g) Warning Beacons. Warning lights and/or beacons shall not be attached to the sign or the trailer.

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(h) Communications.

(1) The AVS trailer shall be equipped with a vendor-provided cellular and modem communication system. All cellular data and plan fees shall be included in the purchase price for the duration of the pilot program or a minimum of 6 months.

(2) The AVS trailer shall be capable of providing real-time information to the

Administration or its designee with connected capabilities via AVS management software and cellular modem.

(3) Provide electronic communication between the AVS trailer, AVS trailer management software, and the University of Maryland�s software and algorithm via AVS management software and cellular modem.

(4) Provide the ability for the University of Maryland�s software and algorithm to change the display on the AVS sign via direct access to the AVS management software. It is anticipated that the display will need to change no more frequently than every 5 minutes.

(i) Monitoring System Requirements.

(1) GPS shall be used to monitor trailer location.

(2) Be capable of reporting sign panel orientation.

(3) Be capable of reporting the current time and date, sign message, battery voltage, available solar power, trailer location in latitude/longitude, sign panel orientation, and system malfunction.

(4) Be capable of configuring customizable alerts and immediately communicating alerts and device malfunction via electronic notification (e.g. text or email) to responsible individuals.

(j) Default Requirements. AVS trailer shall revert to a blank sign display mode upon system malfunction or if the battery output voltage drops below the manufacturer�s recommended output level.

(k) Operating System Requirements.

(1) The sign controller shall be enclosed in a cabinet mounted on the trailer.

(2) An interface shall be used for remote programming, monitoring, and reporting.

(3) Be capable of tracking and recording accurate date/time, location, sign panel orientation, AVS trailer identification number, and project number.

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(4) The operating system shall be equipped with diagnostic capabilities in the event of a system malfunction.

(5) The system shall have the capability of identifying the malfunction in a manner that will expedite the return to full operational mode.

(6) The system shall be capable of remotely changing the AVS trailer advisory speed within one minute.

(7) The management software shall allow changing the advisory speed of multiple advisory speed signs installed as a system and implement the changes in advisory speed in the entire system with output from the University of Maryland software and algorithm within one minute.

(l) Logging/Reporting. The operating system shall have an integrated mechanism capable of logging date and time information when the advisory speed changes are commanded by the output from the University of Maryland algorithm and the speed which is commanded.

104.00.03 CONSTRUCTION

Furnish and test the AVS trailer near the project site in Baltimore County, Maryland as directed by the Administration at least one week prior to the first deployment on the pilot project to ensure that each unit is functioning properly. Provide training on the AVS device usage (approximately

2 hours in the field and 2 hours in classroom or virtual). Provide technical support during the duration of the pilot.

104.00.03 MEASUREMENT AND PAYMENT

Advisory Variable Speed (AVS) trailer will be measured and paid for at the Contract price per

Each. The payment will be full compensation for the Advisory Variable Speed trailer including static and dynamic message sign, delivery to the Administration, management software, management software integration, management software support, training, cellular modem, cellular data plan, and for all material, labor, equipment, tools, and incidentals necessary to complete the work.

104.00 � WORKERS ALERT BEACON (WAB) TRAILER 1 of 3

10/28/2025

CATEGORY 100

PRELIMINARY

SECTION 104.00 � WORKERS ALERT BEACON (WAB) TRAILER

104.00.01 DESCRIPTION

Furnish a portable, self-contained Workers Alert Beacon (WAB) trailer with flashing beacons. The

WAB trailer will support activation of a beacon as part of a pilot program deployed on I-695 for a duration of up to 3 weeks. The WAB shall be deployed with vendor supplied management software.

A WAB is designed to enhance workers� awareness of aggressive driving approaching the work zone while workers are present. When activated, a WAB will display alternating flashing

YELLOW signal heads (beacons) towards the workers.

The WAB Vendor software will be integrated with software including an algorithm developed by the University of Maryland (UMD). The UMD will collect data by drones, process the data via an algorithm, and use the output of the algorithm to activate the beacons. Flashing beacons on the

WAB shall be activated with output from the algorithm.

Provide the Administration�s representatives and the University of Maryland with access to the

WAB management software that allows it to connect to the University of Maryland software and algorithm to the WAB. The access will allow for activating the beacons based on outputs from the

UMD software and algorithm.

Provide technical support to the Administration�s representatives and the University of Maryland during the duration of the pilot including, but not limited to, establishment of an interface control to facilitate communication between the WAB management software and the University of

Maryland software and algorithm.

104.00.02 MATERIALS

The WAB shall include the trailer, structural support system, lift mechanism, power supplies, flashing beacons, communications, and ancillary equipment. All materials for the WAB shall be like new, corrosion resistant, and unaffected by water spray, salt, oil, gasoline, and all other contaminants in the quantities typically found along the edge of a traveled roadway. Construction, materials, and operation shall be in accordance with NFPA, UL, and NEC.

104.00.02.01 Equipment.

(a) Trailer. The trailer shall be painted orange and in accordance with Maryland Motor

Vehicle Law governing trailers.

(b) Power Supply. The WAB shall operate from a solar powered electrical system consisting of battery power and solar array panels. The electrical system shall be capable of

104.00 � WORKERS ALERT BEACON (WAB) TRAILER 2 of 3

10/28/2025 supporting continuous operation of the system for 21 consecutive days without an auxiliary charge and be capable of being charged by a generator or other commercially available power source in case of malfunction, damage, or failure of the primary solar powered electrical system.

(c) YELLOW Lens Requirements.

(1) The WAB unit shall have two 12 in. circular signal heads mounted on the front side of the WAB facing the construction workers. Each signal head shall have one circular

YELLOW lens. The indications shall illuminate in an alternating flashing pattern when activated.

(2) Signal heads shall meet the physical display and operational requirements of flashing beacons according to Part IV of the Maryland Manual on Uniform Traffic Control

Devices (MdMUTCD). Each signal head shall be aluminum or polycarbonate having one 12 in. YELLOW LED indication. All signal housings shall be black or yellow.

(d) Communications.

(1) The WAB systems shall be equipped with a vendor-provided cellular and modem communication system. All cellular data and plan fees shall be included in the purchase price for the duration of the pilot program or a minimum of 6 months.

(2) Provide electronic communication between the WAB trailer, WAB management software, and the University of Maryland�s software and algorithm via WAB management software and cellular modem.

(3) Provide the ability for the University of Maryland�s software and algorithm to activate the beacon when aggressive driving approaching the work is detected via direct access to the WAB management software.

(e) Monitoring System Requirements.

(1) GPS shall be used to monitor trailer location.

(2) Be capable of reporting the current time and date, flashing beacon operating status, battery voltage, available solar power, trailer location in latitude/longitude, beacon heading, and system malfunction.

(3) Be capable of configuring customizable alerts and immediately communicating alerts and device malfunction via electronic notification (e.g. text or email) to responsible individuals.

(f) Default Requirements. WAB shall revert to a non-flashing mode upon system malfunction.

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(g) Logging/Reporting. The operating system shall have an integrated mechanism capable of logging date and time information when the flashing beacons on the WAB were activated with output from the University of Maryland algorithm.

104.00.03 CONSTRUCTION

Furnish and test the WAB trailer near the project site in Baltimore County, Maryland as directed by the Administration at least one week prior to the first deployment on the pilot project to ensure that each unit is functioning properly. Provide training on the WAB device usage (approximately

2 hours in the field and 2 hours in classroom or virtual) during the test. Provide technical support during the duration of the pilot.

104.00.03 MEASUREMENT AND PAYMENT

Workers Alert Beacon (WAB) Trailer will be measured and paid for at the Contract price per Each.

The payment will be full compensation for the Workers Alert Beacon Trailer including flashing beacons, delivery to the Administration, management software, management software integration, management software support, training, cellular modem, cellular data plan, and for all material, labor, equipment, tools, and incidentals necessary to complete the work.