ACB — American Council of the Blind

ADAAG — ADA Accessibility Guidelines

ADA — Americans with Disabilities Act

AER — Association for Education and Rehabilitation of the Blind and Visually Impaired

AGC — automatic gain control

CAC — citizens advisory committee

CBD — central business district

CDC — Center for Disease Control and Prevention

DOJ — Department of Justice

FHWA — Federal Highway Administration

GPS — global positioning system

LED — light-emitting diode

MMU — malfunction management unit

MUTCD — Manual on Uniform Traffic Control Devices for Streets and Highways

NCUTCD — National Committee on Uniform Traffic Control Devices

NEMA — National Electrical Manufacturers Association

NFB — National Federation of the Blind

NPRM — Notice of Proposed Rulemaking

O&M — orientation and mobility

Pedheads — pedestrian signal heads

PROWAAC — Public Rights-of-Way Access Advisory Committee

PROWAG — Public Rights-of-Way Accessibility Guidelines

PUFFIN — Pedestrian user-friendly intelligent crossing

RTOR — right turn on red

TEA-21 — Transportation Equity Act for the 21st Century

TWSI — tactile walking surface indicator

USDOT — U.S. Department of Transportation

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