The railroad may elect to operate under a “stop and proceed” order at a specific crossing. This operation is typically limited to low-speed industrial leads. During stop and proceed operations, the train stops at the island circuit (edge of the crossing) prior to entering the roadway. The train operator will wait at the island circuit until the crossing is clear before proceeding. The train operator will wait until the crossing is free of any vehicles and pedestrians and for the gates to be fully horizontal before proceeding through the crossing. Under a stop and proceed order, train operation is no longer bound by the AREMA 50 second rule as defined in Chapter 4.