Vehicle with gaseous fuel and automatic purge system

The road vehicle includes a gas tank (2) connected to at least one vent channel (3) through a normally closed thermal release valve (5) such that the vent channel leads to a discharge orifice. The thermal release valve can be opened spontaneously under the effect of a temperature rise. The thermal release valve is installed in a predefined zone remote from the discharge orifice. An independent claim is also included for a valve for gas tank of road vehicle.