Comment (02/2010): Starting at the Collin/Grayson County line thru exit 53 on U.S. Hwy. 75 you will encounter a revenue generation machine. Do not speed. You will notice a lot of people driving well under the speed limit. This is because they are aware of the 24/7 scrutiny. Warning – do not pass on the right to avoid slow traffic! Even if it appears to be a (3) lane interstate at all entrance ramps. If State Trooper pulls you over just let him yell and rebuke you. He definetely has issues. I guess I would too if I had to meet unrealistic quotas.