Why must extra care be taken when operating trains approaching bumper blocks and bar doors?

Extra care must be taken when operating trains approaching bumper blocks and bar doors primarily because the moves are generally protected by block signals. Block signals serve as crucial indicators for train operators, ensuring safe distances are maintained between trains and that operations near bumper blocks are conducted with caution.

In this context, bumper blocks are installed at the end of tracks to prevent trains from rolling off and potentially causing accidents. When approaching these areas, operators need to heed the indications of the signals closely as they denote the status of the track ahead, signaling when it's safe to proceed or if the train must stop.

While other factors like increased passenger load, presence of maintenance staff, and reduced visibility may contribute to operational challenges, the protection provided by block signals is a fundamental aspect of ensuring safety in train operations. Signals are specifically designed to manage the safe movement of trains in conjunction with track occupancy, making them a crucial factor when approaching the potentially hazardous areas of bumper blocks and bar doors.