Abstract: The present invention relates to a heated mat assembly for preventing snow and ice accumulation on a driveway. The device comprises a substantially rectangular, rubber pad having planar upper and lower surfaces and four peripheral edges. Disposed between the upper and lower surfaces are a plurality of inner layers preferably constructed with a fiberglass cloth. Embedded within the inner layers are a plurality of heating elements in communication with a thermostat and power cord for selectively activating the heating elements upon the thermostat detecting a temperature below a predetermined value. Along the entire length of opposing edges of the pad are a pair of troughs for draining water from the upper surface directly onto a street. Adjacent each trough are a pair of straps having a grommet at a distal end thereof for receiving a fastener means to anchor the pad to the soil immediately adjacent the driveway.