741.02 Materials.
740-J Electric Incandescent or Fluorescent Light - per each 740-K Area Light - per each 740-L Vertical Panel Type * , ** Sided – per Each 740-M Ballast for Cone - per each 740-O Pilot Car - per each 740-P Portable Rumble Strips - per lump sum * Specify either I or II ** Specify either Single or Double PORTABLE SEQUENTIAL ARROW AND CHEVRON SIGN UNIT
741.01 Description.
This Section shall cover the work of furnishing Porta ble Sequential Arrow and Chevron Sign Units and all services and operational supplies necessary to provide a functional sign unit during the life of the contract. Three categories of furnishing and use of these type sign units are covered by this Section. These categories are as follows: Pay Item 741 -A - The furnishing of a new sign unit, its use during the contract, its re -conditioning and title transfer to the Department upon completion of the project. Pay Item 741 -B - The use of Department furnished units during the contract, the re -conditioning of the unit after completion of the project and its return to the Department's storage yard. Pay Item 741 -C - The furnishing and use of units during the contract with the title remaining with the Contractor.
741.02 Materials.
a.Item 741-A. All sign units furnished by the Contractor for use under this Item shall be listed on List IV -3, WORK ZONE TRAFFIC CONTROL DEVICES, of the Department's "Materials, Sources, and Devices With Special Acceptance Requirements " Manual. Refer to Subarticle 106.01(f) and ALDOT -355 concerning this list. All sign units furnished for use under this Item shall be new units which include all of the latest modifications to manufacturers current production models. Each sign unit shall b e self contained and include message board, power supply and trailer.
b.Item 741-B. These units will generally meet the requirements of Subarticle (a) above and will be made available to the Contractor by the Alabama Department of Transportation for use during the course of the project. These units will have automatic dimming of lamp intensity for day and/or night operation. Operation manuals for these units will be furnished.
c.Item 741-C. All sign units furnished for use under this Item may be new or reconditioned units which were designed and manufactured specifically for use in traffic control which provide at least the following:
1.A minimum 4 foot x 7.8 foot {1.2 m x 2.4 m} message board of an appropriate design capable of producing a left or right hand mode for a sequential chevron (min. of 3 chevrons), flashing arrow, sequential arrow or sequential stem arrow using 5 inch {125 mm} diameter sealed beam lamps.
2.Electronic controls for operating messages at 30 -50 FPM with automatic dimming of l amp intensity for day and/or night operation capability.
3.Power source shall be capable of providing an adequate continuous power supply for at least 24 hours without refueling.
4.A trailer of substantial design for transporting the sign unit from one l ocation to another and to provide a stable setup at location of use.
741.03 C onstruction Requirements.
741.03 Construction Requirements.
a.General . The portable sign unit furnished or provided under this Section is to be used in conjunction with the handling of traffic through the work. The use thereof is shown on the plan details for traffic handling.
b.Maintenance . All sign units shall be maintained in such a manner as to provide continuous service during their use on the project. Units which become nonoperational during use will requ ire the Contractor to provide flagmen or other approved traffic handling methods until the units can be repaired or replaced. In addition to the above the maintenance of units furnished by the Alabama Department of Transportation or which are to become the property of the Alabama Department of Transportation upon project completion shall include the following:
1.The sign units shall be stored in an approved secured storage area when not in use.
2.The Contractor will be required to perform all maintenance operations recommended by the manufacturer of the units keeping adequate records of such operation. The units shall be kept in good repair at all times. This includes cleaning of the unit and maintenance of the exposed protective coatings on the unit.
c.Return or Transfer of Title to the Department . Prior to completion of the project and when the units are deemed of no further use in handling of traffic, each unit shall be cleaned, checked and repaired as necessary to place the unit in good operation condition prior to transfer of title or return of the unit to the Department. After inspection by Departmental personnel and the units are found to be in good operational condition with all working parts functioning, the units along with a copy of the unit's o perating manual, maintenance records and title transfer, if required, shall be delivered to the designated Department storage yard.
741.04 Method of Measurement.
Measurement of Sign Units will be made in complete functional units.
741.05 Basis of Payment.
a.Unit Price Coverage .
1.Item 741-A. The ordered and accepted sign units under this Item, measured as noted above, will be paid for at the contract unit price bid which shall be full compensation for the furnishing of a new sign unit and its exclusive u se on the project, for providing all equipment, supplies, services, labor and incidentals necessary to operate and to maintain the units in good serviceable condition during the life of the contract, for transporting of the units as necessary, and upon com pletion of the project, the reconditioning of the units and the transfer of title of the unit to the Department along with its service records and operating manuals.
2.Item 741-B. The ordered and accepted sign units under this Item, measured as noted abov e, will be paid for at the contract unit price bid which shall be full compensation for the handling of the unit, for providing all equipment, supplies, services, labor and incidentals necessary to operate and to maintain the units in a good serviceable co ndition during the life of the contract and upon completion of the project the reconditioning of the unit to the same condition they were in upon their receipt and the return of the unit, its service records and operating manuals to the Department's storag e facility.
3.Item 741-C. The ordered and accepted sign units under this Item, measured as noted above, will be paid for at the contract unit price bid which shall be full compensation for the furnishing of acceptable new or reconditioned sign units and its exclusive use during the life of the contract, for the handling of the unit and for providing all equipment, supplies, services, tools, labor and incidentals necessary to operate and to maintain the units in a good serviceable condition during the life of the contract.
b.Payment will be made under Item No .: 741-A State Retained Portable Sequential Arrow and Chevron Sign Unit - per each
742.03 Construction Requirements.
741-B State Furnished Portable Sequential Arrow and Chevron Sign Unit - per each 741-C Portable Sequential Arrow and Chevron Sign Unit - per each SECTION 742 PORTABLE CHANGEABLE MESSAGE SIGNS
742.01 Description.
This section shall cover the work of furnishing new portable changeable message signs or utilizing State furnished portable changeable message signs. The furnishing of new signs includes all services and operational supplies necessary to provide a functional sign unit. All changeable message signs shall be in compliance with the current edition of the M UTCD (Manual on Uniform Traffic Control Devices).
742.02 Materials.
a.General . All changeable message signs shall be designated according to "Type" with a Type 1 having a one-line message display panel, a Type 2 having a three -line message display panel, and a Type 3 having a Full Matrix display panel. If ownership of the sign is to be retained by the State and the sign is vehicle mounted, the sign unit shall be suitably adaptable, including all connections, for mounting onto a standard size 1/2 -ton picku p truck. The sign framework and installation shall be structurally adequate to allow complete sign operation, including raising and lowering the sign panel at sustained highway speeds of 62.5 miles per hour {100 km per hour}.
b.Type 1 Message Sign . A Typ e 1 sign shall be a portable, one -line, changeable message sign suitable for mounting on either a truck or on a two -wheeled trailer. The sign system shall consist of a single line sign panel assembly, controller, power supply, structural support system, al l applicable software, and manuals.
c.Type 2 Message Sign . A Type 2 sign shall be a portable, three -line, changeable message sign mounted on a two -wheeled trailer. The sign system shall consist of a three -line sign panel assembly, controller, power supp ly, and structural support system, all mounted on a two -wheeled trailer. The sign unit shall be furnished with all necessary cabling, software and manuals.
d.Type 3 Message Sign . A Type 3 sign shall be a portable, full matrix (variable letter, graphic, a nd symbols), changeable message sign. The system shall consist of a full matrix sign panel assembly capable of producing an inverse display with a programmable controller capable of displaying standard traffic safety and custom symbols. The sign and power plant shall be trailer mounted. The sign shall be furnished with all necessary cabling, software, and manuals.
742.03 Construction Requirements.
a.General . The Contractor shall utilize to the fullest extent the Changeable Message Sign whenever any potent ial hazardous condition exists that would require extra emphasis in warning the driver of any emergencies that might arise during the construction, or at any location directed by the Engineer. Any message used on the sign shall be approved by the Engineer.
b.Pay Item 742 -A. The Contractor shall furnish a new or used sign unit, and shall be totally responsible for the required performance of the sign. An acceptable sign unit shall be one of the units listed on List IV -3, WORK ZONE TRAFFIC CONTROL DEVICES, Sub-Heading "Message Signs" of the Department's "Materials, Sources, and Devices with Special Acceptance Requirements" manual. Information concerning this list can also be found in Sub -article 106.01(f). The Contractor shall retain ownership of the sign un it when the Engineer determines that the sign is no longer needed.
Source: Alabama Standard Specifications for Highway Construction, 2022 Edition. Pages 690–691 of 934.