That's a good article.

I have tried to do this before and believe me, it's hard. I have experimented trying to capture plates at a gas bar that had a problem with drive offs on the far islands.

I originally mounted the camera on the awning looking down, no good. Some plates are tucked up under the vehicle too far. The best I got was mounting it on the awning posts about 4-5 feet off the ground. I now had to use vandal proof units because they were within reach. This meant changing to a board style mini dome. I also found that high resolution B/W infrared with a very narrow view (12mm) was the best (I tried day/night cameras thinking that plate color would be a good thing, didn't work). If the infrared is too strong though, it makes those reflective plates wash out.