ITS Benefits >> In North Carolina, Portable Traffic-Monitoring Devices found to provide a cost-effective and safe means of recording speed and traffic counts in work zones.

National Evaluation of the Safe Trip-21 Initiative: I-95 Corridor Coalition Test Bed, Final Evaluation Report: North Carolina Deployment of Portable Traffic-Monitoring Devices (June 11, 2010) ITS Benefits Database http://www.itsbenefits.its.dot.gov