2022 Volume 77 Issue 5 Pages I_521-I_534
This study proposes a traffic state estimation method that combines probe trajectory data and vehicle detectors. On the Metropolitan Expressway, vehicle detectors are densely placed so that traffic flow can be monitored in detail. However, maintaining all vehicle detectors is a problem in terms of cost. On the other hand, a large amount of probe data has been acquired and its application is being explored. In the future, it is desirable to reduce and streamline the current number of vehicle detectors by making use of probe data. Therefore, this study proposes a method for traffic condition estimation using variational theory (VT), as-suming that the vehicle detectors have been thinned out. As a result of model verification, it is confirmed that the VT can guarantee the same level of accuracy as the current vehicle detectors by calibrating the fundamental diagram (FD) from the viewpoint of traffic control.
