Cars That Go Tunnel, Compulsory Turning the Lights

This article is actually much discussed by the people. I discuss anymore because there are additional useful info I got from a magazine (forget what the name of the magazine) when reading in a bookstore.

If we pass a long tunnel, we would find a post which requires a four-wheeled vehicles must turn on the lights when entering the tunnel. In the magazine explained that turning on the lights in the tunnel is useful to avoid the occurrence of accidents, supposing the lights in the tunnel was extinguished (lamp off). Ok, do not forget to turn on the lights