They are not very accurate, i keep getting a bill from a tollbooth in Denver at a place I have never even been. When I called to dispute it, they said the picture shows a car that has my same plate number but it's a Nevada plate. The machine just reads the number or something but can't tell the difference between a Colorado plate vs. another state.
I don't know who the hell has the honda with my plate number from Nevada but he must be going through that toll booth constantly.