David K. Merritt, George K. Chang, Helga N. Torres, Kiran Mohanraj, Robert O. Rasmussen.
"September 2015."
Prepared in cooperation with the US Department of Transportation, Federal Highway Administration.
Bibliography: pages 59-61.
Cover title.
Final report; August 2013-July 2015.
"Report No. CDOT-2015-07."
Performed by Transtec Group, Inc., sponsored by Colorado Department of Transportation - Research 414.02