The above diagram shows the standard design for am Automated By Pass lane using CCTV cameras and LPR to validate movement through the lane.

The position of the cameras needs to be in a location that is not obstructed by other objects and has a clear view to the natural stopping point of vehicles using the lane. The best position is generally next to to the boom gate. Placing the camera after the boom gate will mean potential obstruction from the boom gate and control box. Placing the camera before the boom gate may prevent the camera viewing the front of the vehicle when stopped at the natural stopping point.

The height of the camera should be high enough to allow the camera to be angled downward to prevent back light problems from the sun, but it should also be low enough to allow easy maintenance. This is usually between 1.7 and 2.0 meters.

To encourage vehicles to stop at a certain location to allow LPR to process the plate, a stop sign can be installed. This should also be positioned to allow easy access to any intercom systems for the driver it the system has problems processing the vehicle. Note: Trucks may require a different intercom location and height to allow for increased dimensions.

To improve processing speed it is also possible to install a secondary camera that would be positioned further along the by pass lane. This will allow the system to detect the vehicle earlier and may prevent the need for the vehicle to stop.