00766cas|a2200181 i 450000500170000000800410001703500150005810000200007324501110009326001090020430000100031349000220032350000630034565000290040865000240043770000210046181001020048220260817163122.0030806s1956    us  uzm rtt  00|  a1eng d  a.b118922741 aGerlough, D. L.10aApproaches to operational problems in street and highway traffic :ba review /cby ... and J. H. Mathewson  aBerkeley, Calif. :bInstitute of Transportation and Traffic Engineering, University of California,c1956  a11 p.1 aReprint ;vno. 45  aReprinted from Operations Research, v. 4, no. 1, Feb. 195610aTraffic sign and signals10aTraffic engineering10aMathewson, J. H.1 aCalifornia.bUniversity.bInstitute of Transportation and Traffic Engineering.tReprint ;vno. 45