I WAS LEAVING WORK AT APPROXIMATELY 0600HRS, I ONLY WARMED THE CAR FOR A FEW MINUTES, THE TEMPERATURE WAS SLIGHTLY BELOW 0. THE BACK ROADS ARE PACKED SNOW, I WAS MAKING A LEFT TURN, AT APPROXIMATELY 100 YARDS THERE IS A RIGHT TURN, I TRIED HITTING THE BRAKES AS I WAS COMING UP TO THE TURN, THE PEDAL WAS STIFF AND DIFFICULT TO PUSH. I TRIED PUMPING THE BRAKES, IT FELT LIKE THERE WERE NO POWER BRAKES. I COULD NOT FEEL THE VEHICLE SLOWING UNTIL I HIT A SNOWBANK ALSO HITTING A TREE. IMPACTING THE NOSE DEAD CENTER. I WAS TRAVELING APPROXIMATELY 20-30 MPH. *TR