Abstract
The detector using fine photoelectric elements was developed to measure the spatial distribution of vehicle velocities on the flow of traffic. To test the equipment and to investigate possible advantages for traffic control, an installation was made on Route 15 in Tokyo. The field test was carried from March 1978 to September 1980. This paper describes the results of this test. Concluding remarks are as follows. (1) The detector has stably and correctly worked for two years without a repair and a regulation. (2) The error in measuring vehicle velocities is less than ±3km/h. (3) As the new area detection capability, the detector is able to estimate the vehicle density in the detection area.
