attachment_1_bid_225_25.pdf
PDF 90 KB Posted
- Attached to
- VEHICLE MOUNTED MESSAGE SIGNS
- Solicitation number
- Bid 225-25
- Issued by
- Hillsborough County, New Hampshire
About this file
This document contains detailed technical specifications for a vehicle-mounted Dynamic Message Sign (DMS) system, likely intended for transportation and traffic control purposes. The specifications outline a full matrix electronic sign capable of displaying various messages and graphics, designed to be mounted on vehicles such as trucks with configurations including headache rack, truck bed floor, or bed rail mount. The DMS is engineered to operate in extreme temperatures ranging from -34°C to 74°C, withstand harsh environments, and function without requiring additional environmental controls like air conditioning or heating.
The system features a wireless controller with local WiFi connectivity, allowing operation through devices like tablets, laptops, or cellular phones without requiring cellular data. The sign includes 16 strobe lights for 360-degree visibility and 2 additional lights for oncoming traffic, with the ability to display at least 12 different strobe light patterns. The specifications require the manufacturer to have a minimum of 10 years of experience in manufacturing DMS for the transportation industry, with a corporate quality manual available upon request. The sign is constructed with a 1" x 3" aluminum frame channel, weighs no more than 140 pounds, and can display messages using a standard font with configurable pixel sizes and brightness levels adjustable from 1% to 100%.
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Other files
| File | Type | Posted |
|---|---|---|
| attachment_2_bid_225_25.pdf | ||
| bid_225_25.pdf | ||
| attachment-2-bid-225-25.pdf | ||
| attachment-1-bid-225-25.pdf | ||
| bid-225-25.pdf | ||
| bid-225-25-award.pdf |
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Text version
GENERAL SPECIFICATIONS
Intent
The purpose of these specifica�ons is to describe a vehicle-mounted enhanced lightbar that is capable of traffic control full matrix dynamic message sign (DMS).
Such signs may also be referred to as Variable Message Signs, Changeable Message
Signs, Electronic Signs and Ac�ve Signs. The DMS shall allow moun�ng to a vehicle in a variety of atachment configura�ons. The DMS shall allow opera�on while moving at freeway speeds or while parked. The unit shall be operated from the
12 VDC vehicle electrical system.
DMS Opera�on
The DMS shall be capable of displaying character or graphics informa�on. The DMS shall be controlled through any device that can connect to the sign controllers local WiFi network. No cellular signal shall be required. The system shall capable of 99 predefined messages including messages that will provide arrows and chevrons.
The standard font shall be 7 pixels wide by 12 pixels high and double stroked and capable of 7 pixels wide by 5 pixels high.
Equipment Components
DMS Display Modules
The DMS shall be made up of display modules which shall contain four (4) LEDs per pixel and pixel spacing of 44mm”. The modules shall be of an environmentally sealed weatherproof design with a rectangular configura�on of 12 pixels by 8 pixels. The pixel design shall provide for a 30-degree wide viewing angle. The body of the module shall be composed of UV-inhibited, high impact, ABS thermo plas�c material and be environmentally sealed against contaminants.
The display modules shall operate in a temperature range of -34 C to 74 C without environmental controls such as hea�ng and air condi�oning. The display modules shall be capable of withstanding harsh vibra�on and environmental condi�ons as set forth by NEMA TS 4. The display modules shall have an IP64 cer�fica�on for dust and water protec�on under the Interna�onal Standard IEC
60529 Edi�on 2.1.
The display modules shall be replaceable within approximately five minutes using simple hand tool, which shall be provided with each sign. The display modules shall be fully interchangeable with no addressing, dip switch se�ngs or other adjustments.
Vehicle Mount 2023 ADDCO 4
DMS Sign Panel
The DMS shall be a full matrix. The DMS shall withstand harsh environments without the need of a sealed sign case for component protec�on and environmental controls. The DMS shall minimize energy consump�on and environmental impact by not requiring air condi�oning, heaters or constant fan driven air circula�on.
The DMS shall be supported by a 1” x 3” aluminum frame channel. The frame shall be heliarc welded. A DMS back panel shall be .063 aluminum sheet and be welded to the frame. The aluminum frame and back shall be chromate etched and finished with a coat of non-reflec�ve flat black enamel paint. The DMS size will vary depending on the number of pixels on the DMS. The Traffic regulator shall weigh no more than 140#.
Pixels Nominal DMS Size Sign Modules Typical Message
48 wide x 8 high 83” x 19.75” 4x1 Horizontal 1 Lines 4 Char
12x7 18” Font
Communica�ons and Power Cabling
The design shall use a weatherproof main bus with posi�ve lock connectors for the transfer of power and communica�ons to the display modules.
Sign Controller (SC8)
Each vehicle mount DMS shall be controlled by a wireless controller that emits a local area Wi-Fi connec�on. Cellular data shall not be required to operate and control the DMS. The sign controller shall provide all the control necessary for sign applica�ons and raising and lowering the sign. Sign applica�ons include the ability of running single and mul�ple page messages. A separate control box for powering on and off and deploying and stowing the sign shall not be required.
The controller shall have the ability to turn on and off auxiliary work or strobe lights that are connected to the vehicle.
The sign controller shall have communica�on and control of a sign through its WiFi network. The following devices may be connected to the Wi-Fi network:
a) Cellular Telephone locally through wifi
b) Tablet
Vehicle Mount 2023 ADDCO 5
c) Laptop or desktop PC
The sign controller shall provide necessary non-vola�le memory for storing a minimum of 99 message sequences.
The sign controller shall feature a photocell to control the brightness of the DMS.
The DMS shall be regulated from 1% to 100% in a minimum of 10 steps.
The sign controller shall control the default message op�ons when the sign is turned on or power is restored. The op�ons shall include:
Sign shall turn on blank.
Sign shall resume the previously displayed sequence.
Sign shall display a preset sequence.
Set up sign parameters.
Customizing the message quick keys
Allow the user to select stored sequences to display on the sign.
Use the sign as an arrow board.
Troubleshoot sign components.
Provide a preview of the message before displaying on sign.
Select and run alphanumeric message sequences from a stored library.
Edit sign parameters such as flash rate and on and off �mes.
Provide viewing of a sequence name before displaying it on the sign.
Sign Panel and Power Tilt Assembly
If designated, a 12-volt DC power �lt unit shall be incorporated into the sign panel moun�ng frame to provide a method to remotely move the sign panel between the horizontal (stow) posi�on and ver�cal (deployed) posi�on. The power �lt unit shall consist of a 12-volt DC, linear actuator(s), 250-pound capacity, equipped with automa�c reset thermal overload and ball detent overload clutches. The actuator control func�on shall be incorporated into the DMS controller for opera�on of the power �lt from user’s interface device.
Sign Surround strobe lights
16 strobe lights shall be on the leading edge of the 3” boarder of the sign to provide a 360-degree lightbar when in the stowed posi�on. 2 addi�onal lights shall be on the botom of the bar to provide strobes for oncoming traffic when the sign is depoloyed. Each strobe light shall be surface mounted with 2 fasteners, and 6
LEDS that are fully sealed. Each strobe light shall be harnessed together with power and shall flash in uniform and be capable of displaying at least 12 different paterns.
DMS Vehicle Mount
The vehicle mount frame shall be constructed of 4” x 2” 11 gauge welded steel tube. Several configura�ons shall be available including headache rack, truck bed
Vehicle Mount 2023 ADDCO 6 floor or bed rail mount.
User Interface Device
A user interface device shall be included from the manufacturer. The type of the device supplied, if not specified by the user, will be a tablet with a minimum screen size of 7”. The tablet shall be imaged to use sign upon boot and automa�cally connect to sign controller.
Manufacturer Requirements
The manufacturer shall have a minimum of 10 years’ experience manufacturing
DMS in the transporta�on industry.
A copy of the manufacturer’s Corporate Quality Manual shall be available on request or as part of a technical submital.
File details come from the government source that posted it. Updated .