There is a speed limit sign as you come out of Comanche going northbound right at the intersection of old and new hwy 81 that says 55 mph. However if you go northbound on old highway 81 there is also a sign less than 1/4 mile that says 45 mph that you can barely see then there is not another sign for approximately 10 miles. I was doing 57 because I thought the speed limit was 55. Fine being $180.00.