Started doing this last night. Driving down the highway at 60 cruise works fine then it suddenly shut off. Green light stays lit but it acts like I hit the brake to to kick it off. It did start working again after a few tries turning it off and back on but it has continued to randomly turn itself off. I don't remember hitting a bump or anything last night when it turned off either. Although this morning it worked till I hit a bump in the road so maybe I did.