What is the first thing I should do if my car breaks down on the highway?

The first thing you should do if your vehicle breaks down on the highway is pull it over to the side break down lane and out of highway lane traffic. If your vehicle needs to be moved from the lane you'll need to put it in neutral and push it out of the highway lanes but be sure that your hazard lights are on and someone is watching traffic. Once your vehicle is out of the main highway lanes you'll want to keep your hazards on and use any flares or marking signs you have to help provide visibility to other drivers that you have broken down. You should then call for assistance and remain with your vehicle until it arrives as wandering the highway can be extremely dangerous and leaving your car alone isn't advisable.