When a vehicle is stopped in a tunnel due to congestion what should a driver do?

Switch on the fog lights.
Switch off the engine.
Only give hand signals.
Keep the engine ticking over in a low gear.

Explantion: If, when driving a vehicle through a tunnel, you are halted in stationary traffic for any length of time, you should switch off the engine to reduce fumes in the tunnel and conserve fuel.

Theory Tester

When a vehicle is stopped in a tunnel due to congestion what should a driver do?

Managing Risk