are you sure? shoot on sheet film? with auto reload? if it's using film, have 70mm and 35mm long roll, which are good enough.In the olden days, TPs were using 4X5 films on the cameras that's why they can blow up the images to see the car plates. But I believe that all of them have been converted to digital now and the flash system is IR. Saw one of them flash a few days back. I was travelling in the opp direction and saw a flash on the cam housing. not very strong so I guess the iso must be very high.
anyway, base on the daytime and night time light level situation, I believe the system is rather foolproof, but if a car is able to speed up to 300km, don't think the camera able to capture it. :bsmilie:
btw, TP has mentioned before, no all cameras post are loaded with camera, them rotate them from time to time, but will not reveal to public where and when.