One idea is to build an mini-railroad at the same time and along the same route as the new pipeline to transport rocks and debris. This could solve the problem we currently have of restrictions on the volume of gravel that can be transported on the Northern Cross-Island Highway, because that highway is primarily a scenic road for tourists.
構想是在隧道上面掛鋼軌作為運輸軌道，軌道上再掛桶子來運輸粗顆粒砂石，就類似運水泥的原理，來解決目前上游清運砂石時，碰到北橫因係觀光公路、會有砂石車運輸容量限制的困境。