9−48 The units shall be kept in good repair at all times. If there is a failure, malfunction, or damage to the unit for any reason, the Contractor will expedite the repair and furnish adequate flaggers or other approved means to provide a safe m eans for control or traffic until the units are put back into service. 924.04 METHOD OF MEASUREMENT. "Advance Warning Arrow Panels" will be measured by number of days the unit is actually employed in t he construction work in accordance with the Plans and/or as directed by the Engineer. 924.05 BASIS OF PAYMENT. The accepted quantity of "Advance Warning Arrow Panels" will be paid for at the contract unit price per day as listed in the Proposal. The price so-stated constitutes full and complete compensation for all labor, materials, and equipment including the unit itself, first placement thereof, temporary storage, repositioning at different locations, diesel fuel, electric power, batteries, maintenance, and all incidentals necessary to finish the work, complete and accepted by the Engineer.
925.01 DESCRIPTION. This work consists of providing, operating and maintaining a portable
trailer on which is mounted a changeable message sign at locations indicated on the Plans or as directed by the Engineer, all in accordance with these Specifications and MUTCD standards. 925.02 MATERIALS. 925.02.1 Trailer. The trailer shall be a portable, rubber tired unit.
925.02.2 Message Sign. The sign shall consist of either a la mp matrix or a rectangular disk matrix
system capable of a flash and sequence rate of one to six seconds. The message displayed from the unit shall be visible from a distance of one-half mile and have an average legibility distance of 850 feet under conditions of normal sunlight.
a.The Lamp Matrix Sign. The sign shall consist of a three line, eight character/module matrix. Each character/module shall be a minimu m of 17 inches high and shall be configured in a 7 by 4 dot matrix. All characters/modules within a message line shall be equally spaced, both horizontally and vertically. Under a normal operation range of 9 volts to 20 volts, the clamp matrix bulbs shall have a projected design life of 10,000 hours. The bulb shall be a two-inch diameter, par-16, sealed beam, double contact bayonet base unit. All lamp matrix characters/modules shall hav e their own lamp driver circuit board mounted on and connected to the back side. The characters/modules shall be hinged to the bottom on the 9−49lamp board for ease of maintenance and repairs. All lamp matrix characters/modules are to be interchangeable. The lamp matrix sign shall be protected from sun-glare by a sunscreen assembly of seventeen louvers per vertical inch at a 20-degree tilt. The controller will be an all solid-state unit. A keyboard entry system shall be provided to allow an operator to generate a number of messages. The keyboard shall be equipped with a security lock-out feature to prevent unauthorized use of the controller. The controller will contain a non-volatile memo ry to hold the keyboard created messages in memory during a non-power period. The controller will have a local message display panel to show the message either being displayed on the sign or being created on the keyboard. In addition, this display panel will be capable of giving the operator all programming instructions. The controller cabinet, with lock able door, shall be mounted on the forward part of the trailer so the operator is viewing traffic while performing operations on the controller. This cabinet shall have an interior light for night operation and programming. The power unit for operating the entire sign system shall be a heavy duty, diesel powered generator with a battery backup system.
b.The Disk Matrix Sign. The sign shall consist of a three line, eight character/module matrix. Each character/module shall be a minimum of 18 inches high and shall be configured in a seven-disk high by five-disk wide matrix. The disks shall be painted fluorescent yellow on one side and flat black on the other. The disk matrix sign shall be equipped with four, 108-inch black-lites for nighttime operation. The black-lites are to be arranged inside the enclosure on both the top and bottom of each line. The front cover shall be hinged for ease of service and each character/module shall be interchangeable with all other characters. The controller shall consist of a lap top computer keyboard and a liquid crystal display which will allow an operator to generate a number of different messages. The "create message" option shall only be accessible by use of a password to avoid unauthorized use of the controller. The controller cabinet with lockable door, shall be mounted on the forward part of the trailer so the operator is viewing traffic while performing operations on the controller. This cabinet shall have an interior light for night operation and programming. The power unit for operating the entire sign system shall be a heavy-duty diesel-powered generator with a battery backup system. 925.03 CONSTRUCTION METHODS. The changeable message sign shall be available for use throughout the duration of the Contract. It shall be positioned and repositioned at the direction of the Engineer. 9−50 The Contractor shall be required to perform all maintenance recommended by the manufacturer of the units, as required to keep the unit operating properly. Said maintenance shall include the periodic cleaning of the units. The units shall be kept in good repair at all times. If there is a failure, malfunction, or damage to the unit for any reason, the Contractor will expedite the repair and furnish adequate flaggers or other approved means to pr ovide a safe means for control of traffic until the units are put back into service. 925.04 METHOD OF MEASUREMENT. "Portable Changeable Message Signs" will be measured by number of days the unit is act ually employed in the construction work in accordance with the Plans and/or as directed by the Engineer. 925.05 BASIS OF PAYMENT. The accepted quantity of "Portable Changeable Message Signs" will be paid for at the contract unit price per day as listed in the Proposal. The price so-stated constitutes full and complete compensation for all labor, materials, and equipment including the unit itself, first placement thereof, temporary storage, repositioning at different locations, diesel fuel, electric power, batteries, maintenance, and all incidentals necessary to finish the work, complete and accepted by the Engineer. SECTION 926 ANCHORED AND UNANCHORED PRECAST CONCRETE BARRIER FOR TEMPORARY TRAFFIC CONTROL
926.01 DESCRIPTION. This work consists of providing anchored or unanchored precast concrete
barrier for temporary traffic control at the locations shown on the Plans or as directed by the Engineer, all in accordance with these Specifications. Anchored barrier on bridge decks will be double-face type barrier except when single-face type units are specified on the Plans.
926.02 Materials.
926.02.1 Anchored and Unanchored Barrier Units. Portland cement concrete and reinforcing
shall conform to the requirements of Subsection 909.02.1 of these Specifications.
926.02.2 Delineators. Delineators shall have a minimum of 9 square inches of reflective surface
area. The unit shall be capable of being mounted on the side of barrier by use of an adhesive or other method approved by the manufacturer. Such delineators may be one of those products which appear on the Department's Approved Materials List.
926.02.3 High Strength Non-Shrink Grout. High Strength Non-Shrink Grout shall conform to the
requirements of Subsection 819.02.2 of these specifications.
926.02.4 Anchorage System. For new or existing bridge decks, anchors shall be a minimum ¾
Source: Rhode Island Standard Specifications (Bluebook), 2024 Edition. Pages 580–582 of 826.