A Side Object Detection System (SODS) for transit buses was cost-effective with a baseline benefit-cost ratio of 1.43 and a ratio range of 0.37-3.55.
The operating conditions of transit buses, characterized by low-speeds, frequent stops and pulling in and out of traffic in a frequently dense urban environment, may not be amenable to the kinds of collision avoidance systems designed for high-speed operations of passenger vehicles and heavy trucks. To help determine the potential for collision warning systems for reducing transit bus collisions, the U.S. DOT sponsored a study of the business case assessment for (or against) seven safety systems:
- Forward Collision Warning Systems
- Rear Collision Warning Systems
- Side Object Detection Systems
- Forward Object Detection Systems
- Rear Object Detection Systems
- Lane Departure Warning systems
- Pedestrian Detection Systems
Results showed that the Side Object Detection System (SODS) was the only cost-effective system, with a benefit-cost ratio ranging from 0.37 to 3.55. The cost-effectiveness of SODS is attributable to the fact that sideswipe collisions occur relatively frequently, and a high proportion of them are avoidable, rendering the potential for savings relatively high. In contrast, forward, rear, and angle collisions occur less frequently and are not as avoidable. Bundled systems only showed a potential for savings if they included SODS, and Pedestrian Detection Systems were cost-effective only for operators with above-average collision rates or high collision costs.
The table below shows the range of benefit-cost ratios for the systems.
In-vehicle Safety System
Estimated Purchase Price
Forward Collision Warning
Rear Collision Warning
Side Object Detection
Forward Object Detection
Rear Object Detection
Lane Departure Warning
Author: Travis Dunn, Richard Laver, Douglas Skorupski, Deborah Zyrowski
Published By: Federal Transit Administration
Prepared by Booz Allen Hamilton, Inc.
Source Date: August 2007URL: http://www.fta.dot.gov/documents/Transit_IVBSS_Business_Case_Analysis_Final_Report_9-07.pdf
Average User Rating
Intelligent Transportation Systems > Crash Prevention & Safety > Collision Avoidance > Forward Collision Warning
Intelligent Transportation Systems > Crash Prevention & Safety > Collision Avoidance > Lane Departure Warning
Intelligent Transportation Systems > Crash Prevention & Safety > Collision Avoidance > Obstacle Detection
Intelligent Transportation Systems > Crash Prevention & Safety > Collision Avoidance > Rear Impact Warning
Intelligent Transportation Systems > Driver Assistance > Object Detection
Typical Deployment Locations
Metropolitan Areas, Statewide
transit bus, transit buses, In-vehicle advanced safety systems, object detection, collision warning, collision avoidance, IVBSS