1. Dept. of Civil Engineering, National Central Univ., No. 300, Jhongda Rd., Jhongli City, Taoyuan County 32001, TW (Corresponding author), e-mail: hippo601204@gmail.com
2. Dept. of Civil Engineering, National Central Univ., No. 300, Jhongda Rd., Jhongli City, Taoyuan County 32001, TW, e-mail: jyhdongl@cc.ncu.edu.tw
3. Dept. of Civil Engineering, National Central Univ., No. 300, Jhongda Rd., Jhongli City, Taoyuan County 32001, TW, e-mail: huangtawi@hotmail.com
4. Dept. of Transportation Technology and Management, Kainan Univ., No. 1 Kainan Rd., Luzhu Shiang, Taoyuan 33857, TW, e-mail: hung.casper@gmail.com