Author
Hourdos, John, et al.
Created Date
Hyperlink Exit Door
No
Lesson Background HTML

A Smart Work Zone Speed Notification (SWZSN) system aims to reduce congestion, queuing, and rear end crashes in work zones by informing drivers of downstream segment speed. The system uses an Intelligent Lane Control System (ILCS) and Portable Changeable Message Signs (PCMS). The SWZSN system was installed at nine stations along a 4.4-mile segment of I-94 in St. Paul, Minnesota in Spring 2016. Video footage was collected from Spring 2016 to Fall 2017 to support the evaluation, using computer vision to extract vehicle trajectory data. A regression analysis used calculated vehicle deceleration rates, detector speed data, and PCMS message logs to examine the effects of various combinations of sign messages and starting speeds on driver deceleration rates.

Overall, the SWZSN system led to mixed traffic safety results. The key finding from the study was that the system is noticed by drivers and resulted in a statistically significant influence on driving behavior.

Other Reference Number
Report No. MN/RC 2019-21
Pages
135
Publication Sort Date
Publisher
Prepared by the Minnesota Traffic Observatory for the Minnesota Department of Transportation
Result Type
Reviewer
Title
Evaluation of the Smart Work Zone Speed Notification System
Project Category
File
External URL Disclaimer

(Our website has many links to other organizations. While we offer these electronic linkages for your convenience in accessing transportation-related information, please be aware that when you exit our website, the privacy and accessibility policies stated on our website may not be the same as that on other websites.)