Conley, Charles F. <br/><br/>
Accident analysis and cost justfification :  left side pennant sign - US - 12 : supplmentary report to study of no-passing zone signing 

 - S.l. :  Michigan Department of State Highways,  1970 
 - 23 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Traffic accidents--Costs