Study was carried out at nine entrance ramps in 3-mi study area on John C. Lodge Freeway, Detroit, Mich to develop freeway variable traffic control system with ramp entrance control permitting opening or closing of ramp; each of entrance ramps was placed under control of ramp signal bearing message "Don't Enter"; signal is blankout type device that shows message only when signal is illuminated; review of week's study shows that great gain in freedom of traffic flow is possible by use of ramp closure system.
Optimization of freeway traffic by ramp control
Nat Research Council -- Highway Research Board -- Research Rec
1964
15 pages
Article (Journal)
English
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