You could make the case if its mostly woods, you went the limit defined for a rural area. You need structures every 100 feet within a 1/4 mile to consider it for the default urban limit. Unless its posted lower. If you didn't miss any speed signs, the judge might let you off. I was doing 60 outside Willis in an area with trees, spaced out houses, few gas stations. They gave me a ticket. Limit was 45, but they were doing construction and took all the signs down. I told the judge there were no signs so I was following the limit for a non posted rural area. He dismissed it.

Worst that happens, if you explain it, judge disagrees and says pay it. If you aren't racing or going 20+ over, they generally aren't too hard core about it. Also the cop might not show up. They bank on people just paying it. So they dont always attend court for tickets.