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Comparison of Two Simulation Approaches to Safety Assessment: Cellular Automata and SSAM
| 题名： | Comparison of Two Simulation Approaches to Safety Assessment: Cellular Automata and SSAM |
| 其他题名： | Amundsen,F.,and Hydén,C.,eds.(1977).Proc.,1st workshop on traffic conflicts,Institute of Transport Economics,Oslo,Norway. |
| 正文语种： | 英文 |
| 作者： | C. Chai |
| 关键词： | occurrences；simulation；flic；cellular；vissim；replica；between；icts；ssam；section |
| 摘要： | A study is conducted to compare two simulation methods for estimating conflicts between road users. An improved cellular automata (CA) model is proposed to estimate the occurrences and severity of traffic conflicts (both vehicle-vehicle and vehicle-pedestrian) at signalized intersections. The proposed CA model is compared with a calibrated method of a surrogate safety assessment model (SSAM) based on Vissim. Simulated conflicts from both methods are compared with observed vehicle conflicts from automated vehicle tracking for both occurrences and severity. Simulation results show that the CA approach is able to replicate realistic conflicts. However, SSAM tends to overestimate occurrences and underestimate the severity of rear-end and lane-change conflicts. SSAM has also been found to overestimate the severity of crossing conflicts. Furthermore, the proposed CA model is able to estimate conflicts between vehicles and pedestrians. |
| 出版年： | 2015 |
| 论文唯一标识： | P-72Y2015V141N06006 |
| 英文栏目名称： | Case Studies |
| doi： | 10.1061/(ASCE)TE.1943-5436.0000766 |
| 期刊名称： | Journal of Transportation Engineering |
| 拼音刊名(出版物代码)： | P-72 |
| 卷： | 141 |
| 期： | 06 |
| 页码： | 42-53 |
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