Institute of Transportation Studies at UC Berkeley

This paper develops an improved algorithm for estimating velocity from isolated loop detector data. Unlike preceding works, the algorithm is simple enough that it can be implemented using existing controller hardware. The discussion shows how the benefits of this work extend to automated tests of detector data quality at dual loop speed traps. Finally, this paper refutes an earlier study that found conventional isolated loop velocity estimates are biased keywords: traffic surveillance, single loop detectors, velocity estimation data screening