[1] Dept. of Civ./Environ. Engineering, San Diego State University, San Diego, CA 92182-1324, United States
[2] Dept. of Math. and Computer Sciences, San Diego State University, San Diego, CA 92182-1324, United States
[3] Jacqueline Golob Associates, 1008 Westcliff Drive, Newport Beach, CA 92660, United States
[4] Institute for Transportation Studies, Social Science Tower 523, University of California, Irvine, CA 92697-3600, United States
[5] 13580 Samantha Avenue, San Diego, CA 92129, United States