Section 628 Section 628 628-A: 6” Cold Plastic Traffic Stripe, Skip White - per linear foot or mile 628-B: 6” Cold Plastic Traffic Stripe, Continuous White - per linear foot or mile 628-C: 6” Cold Plastic Traffic Stripe, Skip Yellow - per linear foot or mile 628-D: 6” Cold Plastic Traffic Stripe, Continuous Yellow - per linear foot or mile 628-E: Cold Plastic Detail Stripe, Color - per linear foot 628-F: Cold Plastic Legend, White - per square foot or linear foot 628-G: 6” High Performance Cold Plastic Traffic Stripe, Skip White - per linear foot or mile 628-H: 6” High Performance Cold Plastic Traffic Stripe, Continuous White - per linear foot or mile 628-I: 6” High Performance Cold Plastic Traffic Stripe, Skip Yellow - per linear foot or mile 628-J: 6” High Performance Cold Plastic Traffic Stripe, Continuous Yellow - per linear foot or mile 628-K: High Performance Cold Plastic Detail Stripe, Color - per linear foot 628-L: High Performance Cold Plastic Legend, White - per square foot or linear foot SECTION 629 - VEHICULA R IMPACT ATTENUATORS
629.01 Description . This work consists of furnishing all materials, components and
accessories and installing impact attenuator systems meeting all of the requirements specified on the plans or in the contract documents, and assembled and constructed at the location(s) indicated on the plans or as established by the Engineer. This work shall also include the installation of median barrier end sections in accordance with the plans, specifications, and the manufacturer's recommendations.
629.02 Materials . Materials used in the construction of the vehicular impact attenuator
system shall all be new and shall conform to the applicable requirements of the respective section(s) of Section 700, as may be supplemented by requirements in other contract documents for the particular system installation. Approved impact attenuator systems shall meet standardized testing defined in NCHRP Report 350 or MASH. In addition, documentation from FHWA must accompany the devices, indicating that the devices meet the ap propriate crash test criteria and can be used on the National Highway System (NHS). Prior to installation, the Contractor shall provide two copies of the manufacturer’s installation de tails to the Project Engineer. The Project Engineer shall keep one copy in project file and provide one copy to District Maintenance Engineer. The installation details shall be engineering drawings, a minimum of 11"x17" in size. Reflective adhesive sheeting with alternating black and yellow stripes (sloping downward at an angle of 45 degrees in the direction traffic is to pass) shall be required on the end of the attenuator section. The type of system installed shall be written on the device with a Permanent Marking Stick or some ot her means of permanent identification. The impact attenuators used must be as shown on the Department's APL. Replacement packages shall consist of spare parts of the e xpected type and number needed to repair one hit for each attenuator unit installed.
629.03 Construction Requirements . The system assembly shall be constructed in
accordance with the requirements for the fabrication and cons truction of the attenuator system as detailed on the plans and in the contract documents. For manufactured products specified, unless otherwise indicated in the co ntract, the system shall be fabricated and installed in accordance with the manufactur er's recommendation. In such case, the Contractor shall obtain the manufacturer's recommended installation instructions, including erection diagrams, and shall furnish the Engineer with a complete copy of such recommended installations and instructions. In the fabrication and construction of any vehicular impact attenuator system, sharp edges, projections, and any misfits of fabrication or construction shall be avoided. Installation of impact attenuators shall be accomplished by experienced workmen in accordance with the recommendations of the manufacturer. As a replacement supply, the Contractor shall furnish a spare parts package. The quantity and materials of this package will be that necessary to repair one hit for each attenuator unit installed. The Contractor shall use these parts to maintain the attenuator until release of maintenance. Upon completion of the work the replacement pack ages shall become the property of the Contractor. The median barrier end section and vehicular attenuator back-up wall shall be constructed in accordance with the plans, the manufacturer's recommendations, applicable provisions of Section 615 and other applicable provisions of the Standard Specifications.
629.04 Method of Measurement . Vehicular impact attenuators will be measured as a
unit for each complete attenuator installed and accepted. One replacement package shall be included in the bid price for each attenuator. Median barrier end sections and vehicular attenuator back-up wall will be measured as a unit for each complete and accepted section. Foundations for attenuators and median barrier end sections are considered parts of the respective units and will not be measured for separate payment.
629.05 Basis of Payment. Vehicular impact attenuators, median barrier end sections and
vehicular attenuator back-up wall will be paid for at the contract unit price per each. In the event an additional replacement package is requi red during the life of the contract, 25% of the lump sum price will be allowed to place the unit back in operation. Payment for the above listed units shall be full compensation for the work and materials required under this Section. Payment will be made under: 629-A: Vehicular Impact Attenuator, Speed Rating - per each 629-B: Median Barrier End Section - per each 629-C: Vehicular Impact Attenuator Back-up Wall - per each SECTION 630 - TRAFFIC SIGNS AND DELINEATORS
630.01 Description . This work consists of furnishing and installing delineators, traffic
signs, sign supports, framing, and panels in reasonably close conformity with the requirements shown on the plans an d set out in these specifications. The work and materials shall conform to the requirements of the MUTCD, current on the date of receipt of bids, except as modified by these specifications or as shown on the plans. The Bidder or the Bidder’s proposed supplier may be required to show satisfactory evidence of successful experience in fabrication of reflectorized multi-panel highway signs prior to award of the contract. Bidders may al so be required to show evidence of successful experience or capability in erection of reflectorized multi-panel highway signs. 630.01.1--Contractor Designed Supports. When specified as Contractor Designed Metal Overhead Sign Supports, the Contractor will be responsible for the design of the metal overhead sign support(s) and overhead sign support(s) on bridges. The design shall meet the latest requirements of the AASHTO Standa rd Specifications for St ructural Supports for Highway Signs, Luminaries and Traffic Signals. The Contractor shall submit to the Director of Structures, State Bridge Engineer, a design using steel. The design shall be a rectangu lar box truss connected at both the top and bottom to the vertical support posts. With the exception of cantilever mounts, overhead support structures shall have two vertical sup port posts at each end of the truss. Design drawings, calculations and other necessary suppo rting data shall be submitted as soon as possible after the Pre-Construction Conference. The controlling sign configuration and total area of design sign shall be labeled on the design drawings. The design shall be prepared by a Professional Engineer registered in the State of Mississippi proficient in the design of overhead sign structures. The Contractor shall provide a detailed cross s ection at the location of each new sign truss. At the locations where the truss will span exis ting roadways, the Contractor shall obtain a surveyed cross section extend ing beyond the limits of the truss. The cross section will show the horizontal dimensions and elevations of ditches, edge of travel lanes, shoulder lines, pavement crown lines, barriers and retaining walls, etc. The truss and signs shall be located on the cross section and shall include both vertical and horizontal dimensions to the finished roadway surface. The overhead sign truss details provided in the plans or documents will not be acceptable as the Cont ractor’s detailed cross section. The cross section information shall be of sufficient accuracy to verify the sign truss dimensions required for each specific location. This information shall be submitted for review with the sign truss shop drawings and calculations.