Traffic Simulation and its Graphic Presentationsby Takashi Nakatsjui, Hokkaido Univ, Japan,
Noritugu Kuwajima, Hokkaido Univ, Japan,
Masaki Aihara, Hokkaido Univ, Japan,
Terutoshi Kaku, Hokkaido Univ, Japan,
Abstract: A computer simulation program for traffic signal timing design was developed. The program can provide some appealing graphic presentations not only of input data but also of output results. Graphic presentations, including among others, a diagram of a network and a signal timing plan, variation of flow profiles with time, and a bird's-eye view of queue length, have now been incorporated into the program. Furthermore, to increase the precision of traffic flow simulation, some enhancements on the traffic flow model were made: realization of a quasi-on-line simulation, introduction of Kalman's filter with forcing terms, and modeling of spill-over phenomena at over-saturated intersections. Applications to an actual urban network showed that the program was effective to obtain the optimum signal parameters and could present good visual understanding about traffic situations.
Subject Headings: Traffic models | Traffic signals | Traffic flow | Flow simulation | Traffic surveys | Graphic methods | Computer software | Highway and road design
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