slippery rail
condition of railways caused by fallen moist leaves that lie on and cling to the top surface of the rails of railway tracks
en-GB/slɪpəɹiː ˈɹeɪl/
en-US/sˈlɪpɹi ˈɹeɪl/
condition of railways caused by fallen moist leaves that lie on and cling to the top surface of the rails of railway tracks