Acknowledgements

The authors acknowledge Mr. Doug Anderson of the Utah Department of Transportation (UDOT) for his management of this research project.

Disclaimer

The contents of this report reflect the views of the authors, who are responsible for the facts and the accuracy of the information presented. This document is disseminated under the sponsorship of the Department of Transportation, University Transportation Centers Program, in the interest of information exchange. The U.S. Government assumes no liability for the contents of use thereof.