Nothing is more important that the right location for your camera.
No-one can place a camera perfect on the first try, plan to move it a couple of times until you get it just right. Make temporary installations at first; once the location has proven that it can do the job then make the installation permanent.
Place the camera at natural choke-points, that is where cars naturally slow down. PS. a stop sign is not a natural choke point, fleeing burglars will blast through the stop sign.
Place the camera on the outside of a curve to get the license plate from most angles. Never place camera on the inside curve as you will only get the side of the vehicle
Better to place the camera low to capture the license plate head on. When placing high, make sure the camera is out of reach.
When pointing the camera upwards problems are 1) sun in the camera, 2) motion detection triggered by clouds, 3) moving trees
Pointing the camera downhill the problems are brake light bleed can sometimes mess with night images, but has not been seen with the new cameras.
Don’t point your camera towards an intersection as you will get a lot of useless images of the sides of cars, point camera at cars coming towards or going away from the camera
To ensure that you get both front and rear license plates of cars, either point all the cameras inwards or all of them outwards. Do NOT point some cameras inwards and other outwards.