Takashi Mitsuzuka¹, Hiroyuki Yamada¹, Kazuya Yokota¹, *Sayoko cudos cudos¹, Kousuke Ikeda¹, Keiichi Kasuga², Takashi Enomono², Takuro Oshima² (1. PACIFIC CONSULTANTS CO.,LTD., 2. Muroran Development and Construction Department)

*kosuke ikeda¹, tsuyoshi urushihara¹, kazuya yokota¹, kikuo kitagawa², satoshi mizuguchi², hidetoshi azuma² (1. Pacific Consultants Co., Ltd, 2. Hokkaido Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism)

*Isao Kobayashi¹, Kousuke Ikeda¹, Atsuko Katou¹, Shouko Tani¹, Naoto Ikeda², Kougi Kimura³, Kazuto Sakuma⁴ (1. Pacific Consultants Co., LTD., 2. Forest Realize Co.,Ltg, 3. SNOW BRAND SEED Co., Ltd., 4. Hokkaido Government)

*Katsuhiko Kitsugi¹, Kenta Fukuda¹, Genji Hattori¹ (1. Central Nippon Expressway Company Limited)

*Takahiro Shitama¹, Yoshinori Kawanishi¹, Hisakazu Natsume¹ (1. Nippon Expressway Research Institute Company)

*Ryota Omori¹, Hideyuki Ito¹, Yushin Asari², Takahiro Fujii¹ (1. Nihon University, 2. Obihiro University)

*MASATOSHI ISIDA¹, Koji Yamamoto¹ (1. TAIYO KOGYO CORPORATION)