The hoop, which is about 40cm across, is attached to a leather pouch containing a brass token. The driver must have this token in his possession before proceeding down the line. At the next stop he throws the hoop to the station master there, and picks up the token for the next section of track.
這個路牌是一個直徑四十公分的鐵圈圈，一端有個牛皮小袋，裝著銅鑄閉塞路牌，司機一定要有路牌才能上路，到了下一站交給當地站長，再拿另一段路牌上路。