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Computerized Traffic Signals; Good for My City�

by Kneeland A. Godfrey, Jr., (M.ASCE), Editor; Civil Engineering Magazine, ASCE World Headquarters, 345 East 47th Street, New York City, NY.,


Serial Information: Civil Engineering—ASCE, 1975, Vol. 45, Issue 11, Pg. 76-81


Document Type: Feature article

Abstract:

Good question. The answer is, It depends. On freeways, some computer-controlled on-ramp signals are dramatically speeding rush-hour traffic. The situation is more complicated when you move from a single artery to a street network. Gains in average travel speed are usually far less dramatic. But there are definite advantages to computerized traffic signal systems. Six case histories are described: (1) scattered intersections with minicomputers, (2) are microcomputers preferable with close spacing of intersections? (2) only one minicomputer for each arterial (4) rerouting of traffic on congested freeways, such as the N.J. Turnpike; (5) computerized on-ramp signals; and (6) computerized arterial-network traffic signals.

Subject Headings: Traffic signals | Computing in civil engineering | Highways and roads | Traffic congestion | Ramps (road) | Intersections | Freight transportation

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