2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 600 SHOULDERS SECTION 610 — SHOULDER RUMBLE STRIPS
610.01 Description
Grind or mill depressions into existing asphalt mix or Portland cement concrete to form rumble strips.
610.02 Materials
Not applicable.
610.03 Construction
Place rumble strips as specified. Grind or mill the rumble strips into asphalt mix at a rate of at least 4000 strips per hour. Grind into Portland cement concrete at a rate of at least 1000 strips per hour. Equipment. The equipment shall have rotary type cutting heads with a length of 16 in. and an outside diameter not greater than 24 in. The cutting heads shall have the cutting tips arranged in a pattern providing a relatively smooth cut (approximately 1/16 in. between peaks and valleys). The cutting heads shall be mounted on their own suspension, independent of the power unit, to allow the tool to self-align with the slope of the shoulder and any irregularities in the shoulder surface. The cutting tool shall be equipped with guides to provide consistent alignment of each cut in relation to the roadway and to provide uniformity throughout the project. The Engineer will randomly check the pattern edge alignment. Control Strip. Grind a control strip at least 100 ft in length to demonstrate that the speed of operation, dimensions, and texture are acceptable. Clean up. Sweep or vacuum the work area before reopening the roadway to traffic. Do not sweep the material to the side of the road.
610.04 Measurement and Payment
complete the work. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS Shoulder Rumble Strips will be measured and paid for at the Contract unit price per linear foot as measured along the shoulder or center line where the rumble strips are actually placed. Payment will be full compensation for all installation of rumble strips, cleaning and disposal of waste material, control strips, and for all material, labor, equipment, tools, and incidentals necessary to 611 — DETECTABLE WARNING SURFACE CATEGORY 600 SHOULDERS SECTION 611 — DETECTABLE WARNING SURFACE
611.01 Description
Furnish and install detectable warning surfaces. Ensure that the detectable warning surface is in accordance with the most recent accessibility guidelines of the Americans with Disabilities Act (ADA).
611.02 Materials
Detectable Warning Surfaces Section 925 Select the detectable warning surface from the Qualified Product List (QPL) maintained by the Office of Materials Technology. Ensure that detectable warning surface materials meet certification requirements prior to use. Submit the proposed source of supply and the specific product for approval.
611.03 Construction
The detectable warning system may be either surface applied or cast in place. However, use only Type I, III, or IV detectable warning systems for new or replacement concrete installations. Install the system according to the manufacturer’s recommendations. Unless specifically addressed in the manufacturer’s recommendations, remove the existing surface texturing by grinding or other means. At a minimum, prepare the concrete surface in accordance with SSPC-SP 13. Remove all old adhesives and sealants. The detectable warning surface shall be 24 in. wide in the direction of pedestrian travel and installed for the full width of the curb ramp, landing, or blended transition. Do not bridge or overhang cracks or expansion joints. Ensure that the vertical edges of the installed system are not more than 0.50 in. above the adjacent surfaces. Place a 2:1 or flatter bevel on edges that are more than 0.25 in. above the adjacent surface. The same edge requirements apply to cut material. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS