This image is from the AIGA symbol signs collection which was produced through a collaboration between AIGA and the U.S. Department of Transportation (DOT) in 1974 and 1979. All images in the collection are public domain .

This image is from a collection commissioned by the United States Department of Transportation and designed by AIGA. It is copyright-free, and is available here . This version was created from the original eps file.

derivative works

Derivative works of this file:

• Main equipment layout of CRH2 EMU.svg
• Washing room sign.svg