AASHTO – American Association of State and Highway Transportation Officials (typically reference is made to their standards, notably the Policy on Geometric Design, 2001).

Access Board – The U.S. Architectural and Transportation Barriers Compliance Board.

Accessible Route – a continuous route that is unobstructed and ADA compatible throughout.

ADA - American Disabilities Act: 1990 Legislation recognizing and protecting the civil rights of people with disabilities.

ADAAG – American Disabilities Act Accessibility Guidelines: Guidelines developed by the U.S. Architectural and Transportation Barriers Compliance Board, July 1998.

APS – Accessible Pedestrian Signals: Signals which are designed to serve pedestrians with disabilities, including audible and vibrotactile signals.

Cross Slope – Slope/gradient that is perpendicular to the path of travel.

Entrance – Point of access to a driveway from a State Road, often serving as a pedestrian crossing where sidewalk is present.

MUTCD – Manual of Uniform Traffic Control Devices, FHWA publication 2000.

Running Slope – Slope/gradient that is parallel to the path of travel.

SW – Sidewalk.