Northbound on US 301 speed limit reduced from 45mph to 20mph at traffic light for school zone. Speed sign of 45mph posted immediately before light with school speed of 20mph posted above highway at light. When light is green driver will not see school speed limit sign because it is not posted at road level as normal. Speed reduction is not justified on four lane highway with no apparent school location adjacent to road. Apparent reason for school zone is to cross students which is already safe due to traffic light and crossing guard. Ticketed for 38mph at cost of $280.00 (fine doubles in school zone). Believe designed to collect revenue from out of state drivers who can not contest ticket.