Activated advance warning for railroad grade crossings.
Contributors: United States. Federal Highway Administration. Offices of Research and Development.; JGM Associates.
Publisher: U.S. Dept. of Transportation, Federal Highway Administration, Offices of Research and Development; National Technical Information Service [distributor]
Published: 1982
Place of publication: Washington, D.C; Springfield, Va
Language: eng
Number of pages: 184
Subjects: Railroads -- Crossings.; Railroad accidents.; Traffic signs and signals.
Notes: Cover title.

"Final report."

"JGM Associates, Inc."--1st prelim. p.

"July 1982."

"Report no. FHWA/RD-80/003."

DOT-FH-11-9346.

Includes bibliographical references.