What action is required if the rear of the train does not clear the restricted area?

In the scenario where the rear of the train does not clear the restricted area, the appropriate action is to wait for clearance from the dispatcher. This is crucial as it ensures the safety of the train, crew, and any maintenance activities that may be taking place in that restricted zone. The dispatcher has an overall view of train movements and can coordinate actions to prevent accidents or hazardous situations.

Waiting for clearance allows the dispatcher to assess the situation, possibly communicate with other trains, and manage any potential conflicts with maintenance operations. It also ensures compliance with established safety protocols, which are designed to protect personnel and equipment working in areas that are under restrictions.

Proceeding at normal speed or slowing down immediately would not adequately address the safety concerns related to not clearing a restricted area, as these actions could lead to potential hazards. Maintaining the track circuit until cleared is unnecessary in this context and does not align with the need for dispatcher oversight when a train is still within a restricted area.