An improved cellular automata model for heterogeneous work zone traffic
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- 作者：Qiang ; Meng ; ; ; cvemq@nus.edu.sg ; Jinxian ; Weng
- 关键词：Work zone ; Heterogeneous traffic ; Cellular automata ; Traffic simulation ; Traffic delay ; Model calibration and validation
- 刊名：Transportation Research Part C: Emerging Technologies
- 出版年：2011
- 出版时间：December 2011
- 年：2011
- 卷：19
- 期：6
- 页码：1263-1275
- 全文大小：510 K
文摘
This paper aims to develop an improved cellular automata (ICA) model for simulating heterogeneous traffic in work zone. The proposed ICA model includes the forwarding rules to update longitudinal speeds and positions of work zone vehicles. The randomization probability parameter used by the ICA is formulated as a function of the activity length, the transition length and the volumes of different types of vehicles traveling across work zone. Compared to the existing cellular automata models, the ICA model possesses a novel and realistic lateral speed and position updating rule so that the simulation of vehicle¡¯s lateral movement in work zone is close to the reality. The ICA model is calibrated and validated microscopically and macroscopically by using the real work zone data. Comparisons of field data and ICA for trajectories, speed and speed¨Cflow relationship in work zone show very close agreement. Finally, the proposed ICA model is applied to estimate traffic delay occurred in work zone.