When coming in to Mexia from the west on Hwy 84, the speed progressively reduces from 70 mph to 45 mph up to the intersection with Hwy 14. Right where the intersection begins with a right hand turn lane, there is a city 30 mph speed limit sign placed 40 feet from the edge of the pavement at the ROW line in front of a electric utility pole. As you drive into town, speed the limit increases to 35 mph and then 40 mph and then 45 mph the thru the main business section of town. This is blatantly a speed trap and the city of Mexia has violated several laws by placing this sign in a no-sign zone as prescribed in the TxDOT field manual for sign placement. I will be fighting a speeding ticket that was issued to me.