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If a speed limit isn't posted, can I fight a speeding ticket? - 40 over speed limit ticket

I was surfing at 48, what I thought was 40 miles per hour, if I stopped doing 48 in a 35th If no speed limit, then I get a chance to fight against this law? Of course, the acceleration from 48 to 40, but closed the ticket when it was misspelled (countries in the region of 35 km / h, however point out that the speed limit has been an area of 40 miles per hour, but the officer said it was 35 more than before), but no signal. This took place in Bridgewater, New Jersey.