882Changeable Message Sign

882.02 Changeable Message Sign

882.01 Description

This work consists of providing, maintaining, and using a trailer -mounted changeable message sign or remote -controlled changeable message sign.

882.02 Materials

Provide an internally -illuminated variable -message sign including the following characteristics:  A magnetically operated matrix, LED, fiber optic, or lamp matrix message board,  A solar and battery power supply,  Hardware for connection to a 110 V power source,  An on -board computer, and  A computer -operated interface. Mount on a towable, heavy duty trailer. Provide a sign capable of t hree lines of text or symbols, each with seven rows and 40 columns of LED pixel display elements. Provide solid state LEDs and LED energize/de -energize circuitry, directly embedded in the display element panel. Ensure each line consists of eight separate , interchangeable display element panels with seven rows and five columns of display elements. Provide display element panels with an evenly installed horizontal matrix, with 3 in [75mm] between individual characters. Ensure each display element panel me asures 18 in [457 mm] high by 13 in [330 mm] wide, with no separate driver boards required to drive the LEDs. Provide a separate wiring harness to power each LED pixel on the display element panels. Provide sign display elements consisting of wide -angle L EDs that allow 30° legibility of the sign message. Ensure LEDs rated for at least a 100,000 hr life. Ensure the display elements operate at temperatures from −20 °F to 140 °F [−29 °C to 60 °C]. Ensure clear sign legibility from 1,000 ft [305 m]. Provide an onboard computer to control the sign. Ensure the sign automatically changes to a pre-selected default message upon failure, and it remains on display until the problem is corrected. Equip the remote -controlled changeable message sign unit with a cellul ar telephone and a security system that prevents unauthorized sign access, but allows access through a password or code unique to that sign. If the password or code is not entered within 60 s of initial telephone contact, terminate the call. Control the remote -controlled changeable message sign with a touch tone modem decoder. Provide a sign capable of storing up to 199 preprogrammed messages, and displaying any of the messages with a call through the trailer -mounted terminal for the changeable message si gns and the remote -controlled changeable message signs. Ensure the sign retains the messages during power failure. Ensure sign operation if the sign keyboard controller is disconnected. Provide a solar recharged battery pack as the primary power supply. CHANGEABLE MESSAGE SIGN 882.05 Provide a solar power supply consisting of solar cell modules installed in a rigid mount at the top of the sign case, and wired to the battery pack through a 30 A solar regulator. Ensure the solar regulator capable of 30 consecutive 24 hr days of operatio n, starting with a fully charged 12 V battery pack without sun under normal weather conditions. Include a temperature - compensated, voltage -regulated 110 V (AC) battery trickle charger, accessible from a standard plug -in convenience receptacle mounted in the side of the pedestal. Ensure a 110 V (AC) battery trickle charger capable of recharging the battery pack within 24 hr to 48 hr. Ensure the temperature -compensated voltage -regulated trickle charger automatically charges the batteries when 110 V (AC) i s applied to the convenience receptacle. Do not require the operator to configure the charging system after plugging in the 110 V (AC) power source. Provide four 12 V D-size batteries, deep cycle rated for solar power systems. Ensure the lamp matrix, LED, or fiber optic sign equipped with a top -mounted photocell for automatic sign-dimming during night use. Provide a trailer rated for 3,500 lb [1,588 kg] including an axle and springs rated for 3,500 lb [1,588 kg]. Ensure each trailer includes hydraulic sur ge brakes rated for 6,000 lb [2,722 kg], with a 2 in [50 mm] ball hitch. Provide a trailer consisting of a frame and tongue constructed of square tube. Ensure the frame is at least 3 in by 3 in [76 mm by 76 mm] and 3/16 in [4.8 mm] thick; and the tongue at least a 3 in by 3 in [76 mm by 76 mm] and ¼ in [6.4 mm] thick. Weld the tongue and trailer in accordance with AWS standards. Use ASTM A 500 grade B alloy. Ensure the trailer is 196 in [4,978 mm] long by 79.5 in [2.019 mm] wide. Provide 15 in [381 mm], five lug wheels with holes for inserting a heavy chain to prevent vandalism. Provide size P205 -75-15 rating B tires. Provide the trailer with four leveling jacks, one at each corner, making the trailer and sign assembly capable of withstanding 104 mph [167 km/h] wind gusts.

882.03 Equipment — Vacant

882.04 Construction Methods .

Provide, place, operate, maintain, and relocate the sign as shown on the Plans.

882.05 Method of Measuremen T — Vacant

884.02 Bridge Guardrail Retrofits

882.06 Basis of Payment

The Department will pay for each p ay item at the contract unit price per the specified pay unit as follows: Pay Item: Pay Unit:

884.01 Description

This work consists of providing and installing bridge guardrail retrofits.

884.02 Materials

Provide materials in accordance with the following sections and subsections Material: Section or Subsection: Portland Cement Concrete 701 Reinforcing Steel 723 Metal Guard Rail 732.01 Aluminum Alloy Tubes for Railings 732.03.C Cast Aluminum Alloy Bridge Railing Post 732.03 Pipe Railing 732.04