降雪时妨碍列车运行的重要原因是道岔不转换。为此，北海道旅客铁道（株）开发一种安设融雪装置的道岔融雪坑，在北海道医疗大学车站内试用。融雪坑设在道岔转辙器下边，槽形，长约１２ｍ，净宽２－５ｍ。在坑壁上铺设２－２ｍ长的轨枕，枕上铺基本轨、尖轨和转辙机等。枕底至 The main reason that hinders the train operation during snowfall is that the switch does not convert. To this end, Hokkaido Passenger Railway Co., Ltd. has developed a snowmelt of a switch for installing a snow melting device, which is piloted at the station of Hokkaido Medical University. Snowmelt pit switch located in the switch below, trough, about 12m, net width of 2-5m. 2-2m long sleepers are laid on the pit walls, the basic railings on the sleepers, the sharp rails and the switch machines. To the end of the pillow