[Code of Federal Regulations] [Title 49, Volume 1] [Revised as of October 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR38.105] [Page 570] TITLE 49--TRANSPORTATION Subtitle A--Office of the Secretary of Transportation PART 38_AMERICANS WITH DISABILITIES ACT (ADA) ACCESSIBILITY SPECIFICATIONS FOR TRANSPORTATION VEHICLES--Table of Contents Subpart E_Commuter Rail Cars and Systems Sec. 38.105 Priority seating signs. (a) Each car shall contain sign(s) which indicate that certain seats are priority seats for persons with disabilities and that other passengers should make such seats available to those who wish to use them. (b) Characters on signs required by paragraph (a) shall have a width-to-height ratio between 3:5 and 1:1 and a stroke width-to-height ratio between 1:5 and 1:10, with a minimum character height (using an upper case ``X'') of \5/8\ inch, with ``wide'' spacing (generally, the space between letters shall be \1/16\ the height of upper case letters), and shall contrast with the background either light-on-dark or dark-on- light.