When you purchase car insurance on your new or used car, the company will usually give you the option of buying an extra car warranty on your car that involves road side assistance. This type of warranty will cover you if your car breaks down on the highway or somewhere that you are not close to home. You can call the number that they give you and they will send out a tow truck in order to see what the problem is or change the tire that went flat or tow your vehicle to wherever you would like to tow it to.