1. Transtec Group, Mechanicsburg, PA.
2. Dept. of Civil Engineering, Aalto Univ., Espoo, Finland.
3. National Center for Asphalt Technology, Auburn Univ., Auburn, AL.
4. German Aerospace Center (DLR), Institute of Transportation Systems, Berlin, Germany.
5. National Engineering Research Center for Highway Maintenance Technology, School of Traffic and Transportation Engineering, Changsha Univ. of Science and Technology, Changsha, Hunan, China.