Electronic aids for freeway operation :  prepared by an OECD Research Group, April 1971. 
a report / 
 - 63 pages ;  27 cm 
 - Road research .
<br/><br/> Summary in French. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>LCCN: </label>77851720  
<br/><br/><label>Nat. Bib. No.: </label>F*** 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic traffic controls<br/>Express highways--Communication systems
<br/><br/><label>LC Class. No.: </label>TE228  / .O74e 1971