System of one-off strewing for twin-trace motor vehicles

The invention relates to a device which makes it possible for the driver to activate own strewing of the roadway with the strewing material in case of glaze ice on the roadway when the vehicle can become even uncontrollable. The device consists of at least one strewing-material container (1), located so that, after opening, the strewing material may pour down in front of braked and/or controllable wheels of the vehicle. The hermetically closed strewing-material container (1), closed with the removable cap (2) on its bottom part, can be connected to the compressed-air container (5) by means of the air duct (3), said container (5) being equipped with the electrically or pneumatically controlled closing valve (4), or the container (1) can be joined with the expansion chamber (11), equipped with the gas generator (12). The spraying, performed by this device, lasts several seconds and the driver has more chance to govern the critical situation during this time interval.