1. Assistant Professor, Dept. of Urban Design and Engineering, Osaka Metropolitan Univ., 3-3-138 Sugimoto Sumiyoshi-ku, Osaka 558-8585, Japan (corresponding author). .
2. Tsuyama Expressway Office Reconstruction Section 2, West Nippon Expressway Company Ltd., 796 Kawabe, Tsuyama City, Okayama Prefecture 708-0842, Japan.
3. Professor, Dept. of Urban Design and Engineering, Osaka Metropolitan Univ., 3-3-138 Sugimoto Sumiyoshi-ku, Osaka 558-8585, Japan.
4. Kansai Branch Office, Miyaji Engineering Ltd., 1-4-11 Tosabori, Nishi-ku, Osaka 550-0001, Japan.