1. Dept. of Civil Engineering, National Taiwan Univ., No. 1, Sec. 4, Roosevelt Rd., Taipei 10617, Taiwan, R.O.C.
2. Northern Region Engineering Office, Taiwan Area National Freeway Bureau, No. 12, Ln. 193, Sec. 2, Chenggong Rd., Neihu District, Taipei 11467, Taiwan, R.O.C.
3. HwaCom Systems Inc., No. 98, Sec. 1, Hsintaiwu Rd., Hsi-Chih District, New Taipei 22102, Taiwan, R.O.C.