What is the primary purpose of cab signals in a locomotive?

The primary purpose of cab signals in a locomotive is to communicate important information directly to the engineer. These signals provide real-time data regarding track conditions, speed limits, and other critical operational instructions that are essential for safe train operation. By displaying this information within the cab, engineers can make informed decisions and respond quickly to changing situations on the tracks, enhancing overall safety and efficiency during travel.

While playing music, managing passenger comfort levels, or controlling fuel consumption may be aspects related to overall train operation or experience, they do not fall under the specific function of cab signals. Cab signals serve a crucial role in ensuring that the engineer is constantly aware of system alerts and regulatory requirements, which is vital for maintaining safety and compliance in railway operations.