00451nam a2200121Ia 4500008004100000040001700041082002800058110006900086245002900155260005000184300001400234650008100248190328s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta614.8620942bU58R  aUnited Kingdom. Department of Scientific and Industrial Research 0aResearch on road traffic  aLondonbHer Majesty's Stationery Officec1965  axi, 505p.  aTraffic flow; Traffic regulation; Traffic signs and signals; Traffic surveys