1. Department of Logistics and Information Engineering, Tokyo University of Marine Science and Technology, Tokyo, Japan
2. Graduate School of Information Sciences, Tohoku University, Sendai, Japan
3. Transport Division, Department of Technology, Management and Economics, Technical University of Denmark, Kgs., Denmark
4. Intelligent Transportation Systems Lab, Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, M.A., U.S.A.
5. Department of Civil and Environmental Engineering, Howard University, Washington, D.C., U.S.A.
6. NUS Business School, National University of Singapore, Singapore