Trucks are motor vehicles that are seen on many different types of roads. Tractor-trailers carry heavy cargo and a metal plate connects the tractor to the trailer. Platform trucks carry animals and produce. Smaller trucks do not have a cab such as a panel truck. Fire trucks, tow trucks, and utility trucks are called emergency trucks.
Flatbed trucks carry logs from trees.
Refrigeration trucks which are cool in the inside carry food. Some construction trucks are so big that they can not use the roads. They must stay at the construction site.