Constant warning time concept development for motorist warning at grade crossings
Subtitle: final report
By: prepared by Systems Technology Laboratory, Inc. ; prepared for U.S. Department of Transportation, Federal Railroad Administration, Office of Research and Development.
Contributors: Systems Technology Laboratory.; United States. Federal Railroad Administration. Office of Research and Development.
Publisher: The Office; National Technical Information Service [distributor
Published: 1981
Place of publication: Washington, D.C; Springfield, Va
Language: eng
Subjects: Railroads -- United States -- Crossings.; Railroads -- United States -- Signaling.; Railroads -- United States -- Communication systems.
Notes: Cover title.

"May 1981."

"Contract no. DOT/FRA-8042."

"Report no. FRA/ORD-81/07."

Includes bibliographical references.