Before driving through a tunnel, what is a key consideration for a driver?

Ensuring there is enough fuel before driving through a tunnel is essential for a few reasons. Tunnels can be long and isolated, and if a vehicle were to run out of fuel inside, it would create a hazardous situation not only for the driver but also for other motorists in the tunnel. Fuel supply allows a driver to have ample power to navigate through potential traffic delays or emergencies.

In addition, running out of fuel could mean needing to stop in a location where stopping is not safe or permissible. Therefore, verifying that the vehicle has adequate fuel prior to entering a tunnel is crucial for maintaining safety and ensuring a smooth journey.

While adjusting mirrors, checking oil levels, and turning on headlights are all important aspects of vehicle maintenance and safe driving practices, they do not directly relate to the immediate concerns of being prepared for the specific environment of a tunnel, which includes considerations related to fuel.