HEADING SOUTH INTERSATE 25 VEARING OFF IN 6TH AVE WEST EXIT (DENVER) I REAR ENDED AN AUTOMOBILE JUST ABOUT PERFECTLY MY FRONT TO THEIR BACK. MY SPEED, APROXIMATELY 20 TO 30 MPH HITTING THE BACK OF A JEEP CHEROKEE WHICH WAS TRAVELING AT APROX. 3 TO 10 MPH. I PUSHED THE FRONT END OF MY TRUCK IN APROX. 12" PAST THE BUMPER. THE AIR BAG DID NOT GO OFF.*AK