| 摘要 |
This invention provides an apparatus for effecting optimal road traffic control of a road network in a traffic area, such a traffic area being divided into a plurality of sub-areas and a district controller being provided in each sub-area. The district controller is provided to control the traffic in the sub-area, road network, establishing a preferential offset for two-way traffic for a tree pattern of the road network which includes no closed road loop, by considering the offset effect quantum for each road section between signals, and a split for each intersection and a common cycle length thereby minimizing the delay time in the sub-area as based on information from traffic detectors on the road and other road conditions. A Central Controller is provided for controlling traffic of the entire road network in the area by coordinating the district controllers as based upon the traffic pattern of the entire area.
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