13th Asia Pacific Transportation Development Conference
Effects of Autonomous and Automated Vehicles on Stopping Sight Distance and Vertical Curves in Geometric Design
Publication: Resilience and Sustainable Transportation Systems
ABSTRACT
Autonomous vehicles are expected to transform the existing transportation system into a safe and efficient future transportation system. The successful deployment and operation of these technologies depend largely on the roadway infrastructure. The existing infrastructure design and operational criteria were developed to meet the needs of human drivers which may not be optimal for AVs. Thus, automated vehicles require strategies that will improve the condition of the current roadway infrastructure before they can be deployed. It is essential to identify the potential changes to design and operational criteria of the roadway to maximize the potential benefits and to ensure successful deployment. This study investigates the impacts of automated vehicles on roadway geometric design elements and evaluates the potential changes in design and operational criteria. The primary focus of this study is the geometric design elements that will directly be affected by the transition from human-driven to fully autonomous vehicles. Stopping sight distance, and length of sag and crest vertical curves are geometric elements directly affected by the implementation of automated vehicles. Stopping sight distance is directly based on drivers’ PRT, in addition to the braking distance. Stopping sight distance will be evaluated using revised parameters to account for the impacts of AVs on highway design elements. Stopping sight distance, and length of sag and crest vertical curves computation will be performed to compare the current model value to the proposed values. Proposed values for these design elements will be presented and their effects will be quantified using quantitative assessment. The current design criteria will be compared with the newly proposed values. Compared with the existing ones, the proposed designs are more economical because shorten curves in general reduce the construction cost by reducing the required earthen work.
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Information & Authors
Information
Published In
Resilience and Sustainable Transportation Systems
Pages: 715 - 724
Editors: Fengxiang Qiao, Ph.D., Texas Southern University, Yong Bai, Ph.D., Marquette University, Pei-Sung Lin, Ph.D., University of South Florida, Steven I Jy Chien, Ph.D., New Jersey Institute of Technology, Yongping Zhang, Ph.D., California State Polytechnic University, and Lin Zhu, Ph.D., Shanghai University of Engineering Science
ISBN (Online): 978-0-7844-8290-2
Copyright
© 2020 American Society of Civil Engineers.
History
Published online: Jun 29, 2020
Published in print: Jun 29, 2020
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