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This experiment was a rather unique and pioneering example of the management of a traffic facility to maintain close to optimal traffic conditions. In that sense, it may be viewed as a precursor of traffic systems of the future. Such systems are likely to involve a fair amount of intervention in the allocation of traffic facilities to traffic demands, a feature virtually absent from traffic systems today. Our traffic-control experiment demonstrated the following four distinctive features: • Accurate, continuous traffic density determination in sections of a traffic link by an ad hoc pattern recognition technique • Development of density-oriented controll algorithms for continuously optimizing traffic flow • Remote location of the computer • Sharing of a computer between batch scientific computations and real-time process control
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