Commercial cars are the type of cars which transport people and goods as its main design and technical features. It contains all trucks and passenger cars which have over 9 seats and they can be graded into passenger cars, trucks, semitrailer towing vehicles, incomplete buses and incomplete trucks. The most common models of commercial car are pickup car, light truck and tractor etc. The purpose of most of the commercial cars are in industry and engineering fields so they usually have very high prices. But because of it, commercial cars have a pretty high strength and can handle many high intensity works.