Pennsylvania Publication 408 — Specifications — Section 644

695.1 695.4

695.1DESCRIPTION —This work is furnishing all material, equipment, tools, and labor required for the

placement and installation of detectable warning surfaces on cement concrete sidewalk curb ramps and other designated surfaces to provide a tactile warning for pedestrians with visual impairments under the provisions of the Americans with Disabilities Act (ADA).

695.2MATERIAL —

(a)Detectable Warning Surface (DWS). Provide a DWS product from a manufacturer listed in Bulletin

15 and meeting the requirements of the Proposed Accessibility Guidelines for Pedestrian Facilities in the Public Right -of-Way (PROWAG) . Provide certification as specified in Section 106.03(b)3 that the DWS meets the following PROWAG criteria:

• General . Detectable warning surface with the surface comprised of truncated domes. Dome size and spacing as specified and as shown on the Standard Drawings.

• Surface . Slip resistant.

• Contrast . Provide a DWS color, as approved by the Representative, that contrasts visually with adjacent walking surfaces either light -on-dark or dark -on-light.

(b)Other Material.

• Class A Cement Concrete . Section 704

• Subbase . Section 350

• Joint Sealant Material . Section 705.4(a), (b), or (c)

695.3CONSTRUCTION —

(a)General. Provide a copy of the DWS manufacturer’s written installation instructions.

(b)New Construction. Coordinate this work with the requirements for new Cement Concrete Sidewalks,

indicated and in accordance with the requirements as shown on the Standard Drawings for the designated curb ramp type or other designated surface.

(c)Alteration or Retrofit Construction. Saw cut and remove the entire depth of existing concrete from

the area where the DWS will be placed. Replace any removed or disturbed aggregate subbase and compact before placing new concrete. Place new cement concrete and follow the DWS manufacturer’s installation instructions for a cast -in- place installation. Fill any saw cut gaps with approved joint sealant material. Fill any gaps around the DWS edge installation with the joint material if necessary.

(d)Protection. Protect the new sidewalk and DWS surface from pedestrian traffic until the adjoining

cement concrete surfaces have properly cured and work is complete at the curb ramp location. Clean the DWS surface using a method recommended by the manufacturer.

695.4MEASUREMENT AND PAYMENT —Square Foot

696.1 696.4(b) 696 – 1

696.1DESCRIPTION —This work is the furnishing, placing, and removing of temporary impact attenuating

devices for maintenance and protection of traffic during construction, as in

Source: Pennsylvania Department of Transportation Specifications, 2026 Edition. Pages 638–642 of 1,522.

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643 TEMPORARY CONCRETE BARRIER, STRUCTURE MOUNTED

651 PAVED SHOULDERS, TYPE 1, TYPE 1-F, TYPE 1-S, AND TYPE 1-SP