A loop detector is commonly used in detecting traffic states (flow, density, and speed). However, a loop detector's location and detection interval will have an influence on obtaining the traffic state. This paper proposes a method for generating the traffic state in a loop detector's mechanism based on the unique traffic flow (vehicular trajectories). In this paper, vehicular trajectories were first achieved based on vehicle space and time information obtained from a VISSIM model. Then, vehicle total travel time and distance were calculated in each detective space-time region. Finally, based on Edie's equation, the traffic state (flow, density and speed) was achieved. The proposed traffic state generation method was tested on Interstate 894, and a typical traffic flow fundamental diagram was successfully obtained. Compared with other methods, the proposed method can easily test the influence of loop detector settlement on traffic state accuracy.
Traffic State Generation from Loop Detectors Based on Vehicular Trajectory Data
14th COTA International Conference of Transportation Professionals ; 2014 ; Changsha, China
CICTP 2014 ; 703-710
24.06.2014
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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