1. Research Associate, Center for Environmentally Sustainable Transportation in Cold Climates, Institute of Northern Engineering, Univ. of Alaska Fairbanks, Fairbanks, AK 99775-5900.
2. Professor, Dept. of Civil and Environmental Engineering, Univ. of Alaska Fairbanks, Fairbanks, AK 99775-5900 (corresponding author).
3. Lecturer, College of Highway, Chang’an Univ., Xian, Shannxi 710064, China.
4. Sales and Marketing Coordinator, Emulsion Products, 2111 Viking Dr., Anchorage, AK 99501.