I was speeding. I mistakenly thought the limit was 75, so I set my cruise control on 80. The actual limit was 70. My Waze app showed I was doing 79 as did my GPS. I was issued a ticket for doing 81 in a 70 which bumped my fine from $150 to $250. Had I been "clocked" at 80, I would have not been penalized the extra $100. I was eager to get to my destination in Austin after being on the road for 8 hours, so I did not argue. I thank God for the bravery and professionalism of our public servants and again, do admit to speeding. But, I really do belive that the extra 1 mph difference added to my ticket was excessive.