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36 CFR Part 1192 Americans with Disabilities Act (ADA) Accessibility Guidelines for Transportation Vehicles (2016 Non-Rail Vehicle Guidelines)

T702.4 Character Height.

Character height shall comply with Table T702.4. Character height shall be based on the uppercase letter “I”.

Table T702.4—Character Height

 Sign location

 Minimum character height

Exterior route or destination signs on boarding side of non-rail vehicle

 2 inches 
(51 mm)

Exterior route or destination signs on front of non-rail vehicle

 4 inches 
(100 mm)

Interior signs designating wheelchair spaces or priority seats, where baseline of character is equal to or less than 70 inches (1780 mm) above the non-rail vehicle floor

 5/8 inch 
;(16 mm)

Interior signs designating wheelchair spaces, priority seats, stop announcements, or stop requests where baseline of character is more than 70 inches (1780 mm) above the non-rail vehicle floor

2 inches 
(51 mm)

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