CHANGEABLE MESSAGE SIGN VISIBILITY... FHWA... TRAFFIC SAFETY  RESEARCH PROGRAM... SUMMARY REPORT... FEDERAL HIGHWAY ADMIN.... U.S. DEPT.  OF T.
Contributors: United States. Federal Highway Administration.
Publisher: s.n.
Published: 1999
Place of publication: [S.l
Language: eng
Notes: Shipping List #: 99-0131-M.

Shipping List Date: 12/21/98.