Abstract
A real-time adaptive signal control system, named COSMOS, generated signal control parameters automatically using collected information from loop detectors. Therefore, the reliability of loop detector information can affect the operational effectiveness of the signal control system. In this paper, a set of practical loop detector installation guidelines was developed through extensive field experiments. Results indicated that a laying depth of 12 cm provided good performance regardless of detector types tested. In addition, a laying depth less than 9 cm should not be selected in practice. The limit lengths of feeder cable were determined as 1,000 m for octagon loop detector and 900 m for circle loop detector, respectively. It was also recommended that the number of soldering should be less than 6 times when the feeder cable length was below 600 m, and 4 times when the length was in a range between 600 m and 1,000 m.
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