At the first sign of car trouble, gently and smoothly take your foot off the accelerator. Do not brake hard or suddenly. Carefully work your vehicle toward the breakdown lane or the side of the road. If you are on an interstate, try to reach an exit. Signal your intentions to drivers behind you. If it is necessary to change lanes, watch your mirrors and the traffic around you closely.
Once off the road, make your car visible. Put reflector triangles behind your vehicle to alert other drivers; use your emergency flashers. If it is dark, turn on the interior dome light.