Motorist aid systems.
Title:
Motorist aid systems.
Author:
National Research Council (U.S.). Highway Research Board.
ISBN:
9780309019088
Corporate Author:
Publication Information:
[Washington]; 1971.
Physical Description:
28 p.: illus.; 28 cm.
Series:
Synthesis of highway practice, 7.
General Note:
"Research sponsored by the American Association of State Highway Officials in cooperation with the Federal Highway Administration."