Motorist aid systems. 

 - [Washington]  1971. 
 - 28 p.  illus.  28 cm. 
 - Synthesis of highway practice ;  7 .
<br/><br/> "Research sponsored by the American Association of State Highway Officials in cooperation with the Federal Highway Administration." 
<br/><br/>Bibliography: p. 26-27. 
<br/><br/><label>ISBN: </label>0309019087 
<br/><br/><label>LCCN: </label>77173640  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Transportation, Automotive.<br/>Traffic safety.
<br/><br/><label>LC Class. No.: </label>HE5613  / .N37 
<br/><br/><label>Dewey Class. No.: </label>388.312  / MOT