1. Department of Civil and Environmental Engineering; University of Illinois at Urbana-Champaign; Urbana IL USA
2. High-Speed Railroad Systems Research Center; Korea Railroad Research Institute; Uiwang Republic of Korea
3. School of Urban and Environmental Engineering; Ulsan National Institute of Science and Technology (UNIST); Ulsan Republic of Korea
4. Department of Civil and Environmental Engineering; Korea Advanced Institute of Science and Technology (KAIST); Daejeon Republic of Korea