Of course it's dangerous, that's why I propose a tiny safety measure Also riding trains is fun.

The problem does apply to players in trains, not AI.

Chain signal makes you stop if it's red. Repeating signal does not - it's just a warning.

Brief:
Train repeating signal with binary state that repeats signal of next semaphore in simple manner. It represents two states: "next block is free" and "next block is occupied".

Problem:
John have two distant bases (Amurica and Bahrain) connected with railway. He's using train to move from ...