ANALYSIS OF FLOW ON AN URBAN THOROFARE

Traffic control conditions on reading road are described prior to 1952, and the complete remodeling and modernization of the traffic signal system which took place in the winter of 1952-1953. Statistical studies are described of speed-and-delay (or traffic-flow) characteristics, and vehicle operating characteristics. The changes are described which took place in terms of traffic volume, capacity, accident records, delays and operating speeds. RESULTS show that revisions in traffic control has raised the practical capacity at three critical intersections by an average of 13% and that traffic volumes on the road had increased, by 1954, between 10 and 15%. The studies also show that, despite the increase in traffic volume, the average trip during the 1954 studies consumed about 7.5% less time than during the 1952 studies and the accident record showed a 21% decrease at signalized intersections. Savings have accrued to motorists using the road in time saved, in lower vehicle operating cost, and in reduced accident cost.