W (Increase/Forward) / S (Decrease/Backward). This sets the direction of travel.

Note: exact keys can vary by locomotive add-on and personal keybindings. Use the in-game Controls menu to view or remap keys for a specific loco.

The keyboard controls in Train Simulator Classic offer several key features:

decreases it. In many locomotives, holding the key will smoothly ramp up the percentage, while a quick tap might move it by a single notch. Brakes (; / '): semicolon (;) increases brake pressure, and the apostrophe (')