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Technical Assistance

The Access Board provides technical guidance on its accessibility guidelines and standards and accessible design through its toll-free helpline at 1-800-872-2253 and by email at from 10:00 a.m. to 5:00 p.m. (ET) weekdays. Accessibility specialists are available to answer questions on accessibility as it relates to the built environment, outdoor sites, streets and sidewalks, transportation vehicles and vessels, information and communication technology, and medical diagnostic equipment.

The Access Board develops and maintains design criteria for the built environment, transit vehicles, information and communication technology, and medical diagnostic equipment under the Americans with Disabilities Act (ADA), the Architectural Barriers Act (ABA), and other laws.

The Board also provides ADA and ABA guides that explain requirements in the current editions of the ADA Guidelines and ABA Standards. The guides offer clearly labeled recommendations for best practices that exceed the minimum requirements. In addition, the Board provides animations to help design professionals understand the reason and method of application of the requirements in the standards. For information on and to request training, visit the Board's Training page.

animation of person using headset

Technical Assistance by Phone

Phone 1-800-872-2253 from 10:00 a.m. to 5:00 p.m. (ET) weekdays for all technical assistance needs regarding the guidelines and standards covered by the Americans with Disabilities Act (ADA), Architectural Barriers Act (ABA), and Section 508 of the Rehabilitation Act.

office building (photo from outside, showing a dramatic perspective on the leading edge corner)

Buildings & Sites

Email for technical assistance on general building and facilities.

refreshable braille keyboard (photo shows fingers on the i/o controls, and the edge of a computer keyboard positioned on top)

Information & Communication Technology

Email for questions on the Board’s standards for information and communication technology (ICT).

medical imaging machine (photo shows empty patient table at tunnel entrance of large device)


Email for questions about accessibility standards for medical diagnostic equipment, including exam tables, scales, x-ray, and other equipment.

two people in wheelchairs at a campsite


Email for questions about outdoor areas, including trails, beaches, and picnic and camping areas.

cruise ship at sea (photo is from a birds eye perspective)

Passenger Vessels

Email for questions about passenger vessels, including cruise ships, ferries, and tenders intended to transport passengers.

cane trailing sidewalk (photo closeup on cane with red stripe and white bulb at end, in front of a blurred shoe)

Public Rights-of-Way

Email for questions about public rights-of-way, including sidewalks, street crossings, and other pedestrian used features.