Do you want to turn on the headlights when crossing the tunnel?

When you enter the tunnel, you are prompted to turn on the light, but generally you can't turn on the high beam, which will affect the passing cars and interfere with the oncoming cars. Traffic accidents are easy to happen in narrow tunnels, not only in tunnels, but also on ordinary roads where cars are very close at dark.

When vehicles enter a two-way tunnel, they should generally turn on the low beam instead of the high beam. If there is no light in the tunnel itself, they can change the light, but when there is a car coming from the opposite side, they have to turn on the low light to pass.