Positioning of red light cameras can differ from intersection to intersection. Some are set at corners of intersections while others are placed on boulevards between streets facing an intersection.
All red light cameras are mounted on poles, in most cases, a minimum of 12 feet above ground. This prevents vandalism and direct tampering with red light cameras. The main reason for mounting red light cameras high from the ground is to help ensure that when a picture is taken, other vehicles are not blocking the license plate of the offending vehicle. The different types of poles are fixed, hinged, manual and automatic lower. When the red light camera pole and cabinet are installed they are connected to the main power supply, signal controller and subsurface loop detectors / triggers.
Many intersections have multiple red light cameras mounted at all corners pointing inward to cover all possible angles and directions of traffic flow. This ensures maximum return on investment for the installation of the red light cameras.
Choosing to capture front, rear and the driver's face is mandated by state law. In some states, owner onus is the law, meaning the owner of the vehicle is always responsible regardless of who is actually driving the vehicle. In other states, driver identification is required, meaning a clear photo of the driver is required to issue a red light camera ticket.