Truck dashcams are dashcams specifically design for use on trucks and bigger vans. Truck dashcams usually have two, three or even four separate cameras in order to record everything around the truck or van. The separate cameras are usually waterproof and are connected to the main body in the cabin with long cables in order to mount then on the back of the truck. 

Most truck dashcams also have a bigger LCD screen than ordinary dashcams. This makes them ideal to use as a truck camera system. Using a truck dashcam makes driving a lot safer and more comfortable.