Bicycle-safe grate intets design manual / 
United Sates, Department of Transportation 
 - Washington, D.C. :  The Department,  1980 
 - v, 47 p. :  ill., chart ;  28 cm. 
<br/><br/> Implementation package FHWA-1P-80-13 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Traffic safety--United States<br/>Roads--Interchanges and intersections--United States<br/>Transportation safety--United States
<br/><br/><label>Dewey Class. No.: </label>363.1250973