1. Dept. of Computer Science and Information Management, Hungkuang Univ., Taichung 43302, Taiwan (corresponding author).
2. Dept. of Transportation Logistics and Marketing Management, Toko Univ., Puzih City, Chiayi County 61363, Taiwan.
3. Dept. of Traffic Science, Central Police Univ., Taoyuan, 33334, Taiwan.