1. Assistant Professor, Dept. of Transportation Technology and Management, Kainan Univ., No. 1 Kainan Road, Luzhu, Taoyuan 33857, Taiwan (corresponding author).
2. Assistant Professor, Civil, Environmental, and Architectural Engineering, Univ. of Kansas, 2159B Learned Hall, Lawrence, KS 66045.
3. Engineering Associate II, Kansas Dept. of Transportation, Eisenhower State Office Building, 700 S.W. Harrison, 13th Floor, Topeka, KS 66603.
4. Assistant Professor, Civil Engineering in the Dept. of Mechanical Engineering, Purdue Univ. Calumet, Powers, Room 211L, 2200 169th St., Hammond, IN 46323.