This type can be mounted on any flat surface and are commonly mounted high up. This position gives it a commanding view and excellent depth perception. For larger vehicles this would be the number one choice.
Infrared Night Vision
Many rear view cameras are fitted with infrared night vision. The camera is fitted with infrared LED lights and will give you a picture even in total darkness. Do not expect to see way into the distance, 20-30 feet is normal for infrared and it will be in a monochromatic colour.
License mounted cameras
This type is mounted on the existing license plate hole, so installation is easy with no modification or new holes that need to be drilled. Depending where your plate is, the position of the camera can be off-center or close to the road.