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Coverage extends to temporary as well as permanent facilities. Chapter R2 also includes special <br />provisions for historic facilities and contains a limited series of general exemptions from <br />accessibility. <br />Chapter R3: Technical Provisions contains detailed specifications for new construction and <br />alterations scoping in Chapter R2. Construction detailed in Chapter R3 is specific to public <br />sidewalk, street crossing, and roadway projects, and covers the building blocks of pedestrian <br />accessibility: the pedestrian access route (analogous to the accessible route on a site), curb ramps <br />and blended transitions, pedestrian crossings (including those at roundabouts and channelized <br />turn lanes), pedestrian signals, street furniture, and parking. <br />Chapter R4: Supplementary Technical Provisions include specifications adapted from the ADA <br />and ABA Accessibility Guidelines (2004) for rights -of -way application, including such features <br />as maneuvering clearances at doorways; drinking fountain, and telephone provisions; reach <br />ranges; operable parts; handrails; and other items of broader application. <br />6 <br />