TY  - BOOK
AU  - Dudek,Conrad L.
ED  - American Association of State Highway and Transportation Officials.
ED  - United States.
ED  - National Cooperative Highway Research Program.
ED  - National Research Council (U.S.).
TI  - Changeable message signs
AV  - TE228 .D83 1997
U1  - 625.794 21
PY  - 1997///
CY  - Washington, D.C.
PB  - National Academy Press
KW  - Traffic signs and signals
N1  - "Research sponsored by the American Association of State Highway and Transportation Officials in cooperation with the Federal Highway Administration."; "National Cooperative Highway Research Program."; Includes bibliographical references (p. 47)
ER  -