The wonderful go-to for answers to tough questions: http://forums.aaca.org/ubbthreads.php/topics/518314/License_plate_with_PP_inside_a.html#Post518314
Rush hour traffic heading south in the other lane, and that is a mess to be stuck in. 30 minutes will only get you as far as 5 minutes in regular traffic.
This last one looks good full size, it seems to be similar to a real field of view.