544CRASH CUSHIONS

544-1 Description.

Install redirective crash cushions as shown in the Plans. Redirective crash cushions are safety devices with capabilities to redirect the impacting vehicle along the full length of the device.

544-2 Approved Product List ( APL).

Use crash cushions listed on the APL. Manufacturers seeking evaluation of cras h cushions for inclusion on the APL must submit the following:

544-3 Installation.

Handle and install manufactured materials or articles in accordance with the manufacturer’s instructions and the Standard Plans . Transition crash cushions in accordance with the Plans, Standard Plans, Index 544-001 and the APL drawings. Delineate crash cu shion ends with Type IV or better retroreflective sheeting meeting the requirements of Section 994. Install retroreflective sheeting with a minimum surface area of 360 square inches and a minimum height of 15 inches. As an alternative, a Type 1 object marker meeting the requirements of Section 705 may be used to delineate the crash cushion end . Center the object marker 3 feet in front of the crash cushion end. Perform repairs necessary due to defective material, work, or operations without additional cost to the Department. Restore crash cushions damaged by the traveling public after the installation is completed, accepted and serving its intended purpose on an open section of bridge or roadway within 24 hours.

544-4 Method of Measurement.

The quantity pa id for will be the number of each type as designated, constructed, in place, and accepted. Crash cushion types are designated by Test Level (TL) and include either narrow or wide systems.

544-5 Basis of Payment .

Price and payment will be full compensation for all work specified in this Section , including delineation and system transitions to guardrail or rigid barriers . FY 2023-24 Return to Table of Contents Relocation of an existing crash cushion to a permanent location called for in the Plans will be paid for at the Contract unit price for relocating existing systems. Price and payment will be full compensation for relocating and reinstalling the system in a ccordance with the manufacturer’s instructions and the Standard Plans . Payment will be made under: Item No. 544 - 2- Crash Cushion TL -2 Item No. 544 - 3- Crash Cushion TL -3 Item No. 544 - 74- Relocate Crash Cushion - each FY 2023-24 Return to Table of Contents SECTION 546 RUMBLE STRIPS

546-1 Description.

Construct rumble strips in accordance with the details shown in the Plans and Standard Plans, Indexes 546-001, 546-010, and 546 -020.

546-2 Materials for Raised Rumble Strips.

546-2.1 Permanent Raised Rumble Strips : Construct permanent raised rumble strips

using one of the following:

546-2.1 1 Preformed Thermoplastic : Use only materials listed on the

Department’s Approved Product List ( APL), meeting the following requirements : Preformed Thermoplastic ....................... 971-1 and 971 -6 Ensure that the material used can be restored to its original dimensions by using a self bonding overlay meeting these requirements. Submit a certified test report to the Engineer indicating that the materials meet all r equirements specified.

546-2.1 2 Asphalt: Any plant -mixed hot bituminous asphalt mixture meeting the

requirements of a job -mix formula issued by the Department, except open -graded friction course.

546-2.2 Short -Term Raised Rumble Strips: Construct short -term raised rumble strips

meeting the requirements of 546 -2.1, or by using removable polymer striping tape meeting the requirements of 990 -9.

546-3 Application.

546-3.1 Permanent Raised Rumble Strips: Notify the Engineer before the placement of

raised rumble strips. Apply raised rumble strips having well defined edges. Remove and replace any raised rumble strips not meeting the requirements of the Contract Documents at no additional cost to the Departm ent. Before applying raised rumble strips, remove any material that would adversely affect the bond of the raised rumble strips by a method approved by the Engineer. Apply raised rumble strips only to dry surfaces, and only when the ambient air and surface temperature is at least 55ºF and rising. Before applying thermoplastic materials on portland cement concrete surfaces, apply a primer sealer recommended by the manufacturer. Prior to the application of any plant -mixed hot bituminous material, appl y a tack coat meeting the requirements of 300 -2.3. The mixture will be accepted on the basis of visual inspection by the Engineer with no further testing required.

546-3.2 Short -Term Raised Rumble Strips: Install short -term raised rumble strips

before opening to traffic, and in accordance with 546 -3.1. Maintain and remove short -term raised rumble strips until permanent raised rumble strips are installed.

546-3.3 Ground-In Rumble Strip :

546-3.3 1 General: Grind rumble strips that have well -defined edg es and smooth

interiors without tearing the finished pavement. On a daily basis, before opening the adjacent lane to traffic, ensure that all debris generated by the grinding process is removed and disposed of by vacuum or a method FY 2023-24 Return to Table of Contents