Effects of Autonomous and Automated Vehicles on Stopping Sight Distance and Vertical Curves in Geometric Design

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.

Language

  • English

Media Info

  • Media Type: Web
  • Features: References;
  • Pagination: pp 715-724
  • Monograph Title: Resilience and Sustainable Transportation Systems

Subject/Index Terms

Filing Info

  • Accession Number: 01745925
  • Record Type: Publication
  • ISBN: 9780784482902
  • Files: TRIS, ASCE
  • Created Date: Jun 29 2020 3:02PM