Well I've known this for a while and thought I would share this with you guys. In the cities of Allen, Plano, and McKinney they send the majority of their patrol division out on Wednesday. They go out targeting speeders specifically and do go after people that may even only be going 5 over the PSL. They are not as heavy on the rest of the days of the week but are very heavy on Wednesdays, I see laser the most on these days where they put the unmarked cars and motorcycles on the highway.