What should be done if the ASC is malfunctioning and the brakes do not release?

When the Automatic Speed Control (ASC) system malfunctions and the brakes do not release, it's crucial to handle the situation with attention to safety and compliance with operational protocols. The correct action is to cut out the ASC and proceed at restricted speed. This approach is essential because the ASC is designed to help regulate train speed, and if it's not functioning correctly, the risk of speeding accidents increases significantly. By cutting out the ASC, the train crew can regain control over the train's speed and operate it at a safer, more manageable pace.

Proceeding at restricted speed allows the train to navigate the rails cautiously, especially since the malfunction could indicate an underlying issue that might affect the train's performance or safety. It also ensures compliance with operating regulations that prioritize safety in the event of equipment failures.

In this context, stopping the train and awaiting further instructions might seem reasonable but could lead to gridlock on the rail network or expose the train to greater risk if it stops in an unsafe location. Using an emergency signal to alert the dispatcher is important in emergency situations, but it does not directly address the immediate need to control the train's speed in light of the ASC malfunction. Continuing at regular speed during this situation is unsafe and would be against protocol, putting both the