What is the difference between semi-automatic block and automatic block?
2 Answers
The difference between automatic block and semi-automatic block is that the automatic block does not require manual operation, while the semi-automatic block requires manual block handling procedures. Here are some introductions about automatic block and semi-automatic block: 1. Semi-automatic block: This type of block requires manual block handling procedures. Trains depart based on the display of the departure signal, but after the train departs, the departure signal can automatically close, hence it is called semi-automatic block. 2. Automatic block: Based on the train operation and block section conditions, the signal can automatically change its display. Trains run according to the signal display, and this block method is entirely automatic, hence it is called automatic block. The automatic block is a device that automatically completes the block task for running trains.
When taking the train, I always ponder these things. The main difference between semi-automatic block and automatic block lies in their management methods. Semi-automatic block requires manual intervention by station attendants, such as confirming the section is clear via phone communication before dispatching a train—much like a manual checkpoint. Automatic block, on the other hand, is fully intelligently controlled, using track circuits to automatically detect train positions and signal lights to change automatically, ensuring safe spacing. This results in a significant difference in traffic density: a semi-automatic block section can only accommodate one train at a time, like a one-way street that must be cleared before the next train enters. Automatic block divides the section into smaller segments, allowing different trains to travel in different segments of the same section simultaneously, significantly improving efficiency. When riding high-speed rail, I clearly feel that automatic block makes schedules more frequent and reduces waiting time.
