Evaluation of Dedicated Lanes for Automated Vehicles at Roundabouts with Various Flow Patterns
Autonomous vehicles (AVs) are about to be used in transportation systems in the near future. To increase the level of safety and throughput of these vehicles, dedicated lanes for AVs have been suggested in past studies as exclusive mobility infrastructure for these types of vehicles. Although these lanes can bring obvious advantages in a transportation network, overall performance of these lanes, especially in urban areas and in micro level sight, is not clear. This study aims to examine the efficiency of dedicated lanes for AVs in a roundabout with an unbalanced traffic flow pattern. Four factors of travel time, delay time, speed of vehicles, and queue of vehicles have been selected as variables of traffic performance at the roundabout. Two microscopic traffic simulation software, AIMSUN and SIDRA Intersection, were used to examine the impact of the AV dedicated lanes at the roundabout. This study shows that the effects of an imbalanced traffic pattern in a roundabout are higher when the penetration rate of AVs is lower and also dedicated lanes in a roundabout’s legs may improve traffic performance indicators when the penetration rate of AVs is higher, but this improvement is not significant.
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Corporate Authors:
Transportation Research Board
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Authors:
- Nickkar, Amirreza
- Lee, Young-Jae
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Conference:
- Transportation Research Board 98th Annual Meeting
- Location: Washington DC, United States
- Date: 2019-1-13 to 2019-1-17
- Date: 2019
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; References; Tables;
- Pagination: 11p
Subject/Index Terms
- TRT Terms: Intelligent vehicles; Roundabouts; Traffic flow; Traffic lanes; Traffic safety
- Subject Areas: Highways; Operations and Traffic Management; Planning and Forecasting;
Filing Info
- Accession Number: 01702249
- Record Type: Publication
- Report/Paper Numbers: 19-02543
- Files: TRIS, TRB, ATRI
- Created Date: Apr 18 2019 4:56PM