railway signal

a sign or light beside a railway track that tells the train driver when to stop, go, or slow down

A railway signal is a system of visual signs or lights used to control and guide trains, ensuring safe and efficient travel on the tracks. These signals provide important instructions to train operators, such as when to stop, slow down, or continue. Railway signals can include colored lights, mechanical signals, or electronic devices that communicate with the train. They help prevent accidents by controlling train movements, especially at crossings, junctions, or busy sections of track. The main purpose of railway signals is to manage the flow of train traffic and ensure safety for both passengers and workers.