Active Safety-Collision Warning Pilot in Washington State

The Rosco/Mobileye Shield+ system is a collision avoidance warning system (CAWS) specifically designed for transit buses. This project involved field testing and evaluation of the CAWS in revenue service over a three-month period. The system provides alerts and warnings to the bus driver for the following conditions that could lead to a collision: 1) changing lanes without activating a turn signal, 2) exceeding posted speed limit, 3) monitoring headway with the vehicle leading the bus, 4) forward vehicle collision warning, and 5) pedestrian or cyclist collision warning in front of, or alongside the bus. Alerts and warnings are displayed to the driver by visual indicators located on the windshield and front pillars. Audible warnings are issued when collisions are imminent. Research objectives included: create a robust Rosco/Mobileye demonstration pilot for active/collision avoidance within the State of Washington on a minimum of 35 transit buses; determine the ease of retrofit of the existing fleet; develop a methodology for estimating the full costs savings of avoided collisions for each agency; develop a methodology and evaluation process for transit driver feedback and acceptance as well as bus passenger feedback; and provide detailed data and understanding on entrance barriers to this technology. The pilot test showed that although driver acceptance was mixed, there were large reductions in near-miss events for CAWS-equipped buses. Consequently, achieving driver acceptance will be a key factor in continued development and deployment of CAWS. As a result of comments received from the drivers, the vendor has begun a program to incorporate desired modifications to the system including reducing false positives. A second major factor in achieving industry acceptance is to demonstrate the business case for CAWS to both transit agencies and system developers. Although the pilot project produced encouraging results, collisions, injuries and fatalities can be considered rare events. A much larger in-service test will be needed to demonstrate actual cost-savings.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: 33p
  • Serial:
  • Publication flags:

    Open Access (libre)

Subject/Index Terms

Filing Info

  • Accession Number: 01643748
  • Record Type: Publication
  • Report/Paper Numbers: Transit IDEA Project 82
  • Files: TRIS, TRB, ATRI
  • Created Date: Aug 18 2017 9:15AM