My question involves a traffic ticket from the state of: Texas
Today I continued straight on a left turn only lane. I wanted to go straight and I didn't realize I was in a left turn only lane until I reached the intersection. The only indication it is a left turn only lane are markings on the road until you reach the traffic light. There was a decent amount of traffic so changing lanes was not an option. I then noticed the lane did continue straight even though it was a left only lane. I didn't see any reason why I couldn't continue on but then I saw the lights behind me. I thought the sign was just incorrect. Would it be worth my effort to fight this ticket?
Here's a link to google streetview of the intersection. I was driving South on Preston RD across I635.
http://maps.google.com/?ie=UTF8&ll=3...78.52,,0,14.65
I appreciate any suggestions anyone has for me. Thanks!

