Tunnels form a supplementary part of the highways. Crossing the geographical barriers which forms difficulty in passing over by tunnels provides great advantages in national and international communication. Fewer traffic accidents happen in the tunnels than on areas without tunnel. On the other hand accidents in tunnels, especially fires, can have dramatic consequences, since they happen in a closed area. The European Union prepared and put into force the directive on minimum safety requirements in road tunnels in 2004, due to the accidents happening in the tunnels within the boundaries in recent years. In this study, the current situation of 18 road tunnels in Turkey is examined; compliance of the tunnels in Turkey to EU directive is considered; and the things to do to secure the traffic safety in these tunnels are stated.