Evaluation of sensing and warning technologies to enhance performance of School Bus Stop Ahead signs.
Statewide, Ohio, United States
Comparison and Evaluation of Potential Technology Enhancements to School Bus Stop Ahead Signs
Summary Information
School Bus Stop Ahead signed are commonly used to warn drivers of locations where school buses typically stop to load and unload passengers, especially when there are issues with horizontal or vertical sight distances. This study considers technologies in use or could be used to augment performance of the signs through sensing (13 technologies) and warning (4 technologies) drivers.
Methodology
The sensing and warning technologies were evaluated considering the following factors (weights in parenthesis): system capital costs (10 percent), system recurring costs (10 percent), research implementation ready (25 percent), system maintenance time (5 percent), coordination time (5 percent), user intervention requirements (10 percent), and safety benefits (35 percent). The cost model was developed following standard practice in Ohio for installation of school zone traffic control devices. Data for the analysis was derived from the literature.
Findings
Based on the evaluation criteria, the Bluetooth-based detection system coupled with flashing beacons activated by Bluetooth media access control (MAC) data transmitted by school buses approaching bus stops was identified as the most cost-effective option to enhance safety in addition to the installation of School Bus Stop Ahead signs.
Flashing beacons on a fixed schedule are estimated to reduce crashes by 15 percent. Activated flashing beacons are estimated to reduce crashes by 29 percent. Activated variable message signs are estimated to reduce crashes by 26 percent.