hmmm, i dunno if your gonna get any help since you passed a sign that says @0mph between signs. If I saw that Id be inclined to slow down to the 20 till I either saw the flashers or passed the school. However Id still go before the judge. Tell him what you told us....you were in an area you dont travel in, you turned onto the road not knowing it was already in the school zone. You were going under what you thought was the posted speed limit. Never know what the judge might be thinkin that day but maybe hell let ya off with a warning.