This works out to a traffic-focused police vehicle every six miles or so (assuming I noticed every vehicle), and this does not count the local departments who are also likely gearing up to cash in on the increased traffic due to the holiday. Thus, if you are not desirous of a speeding ticket (the cheapest speeding fine in Michigan is $90 plus court costs) then I suggest you slow down.
In years past I would have chalked up this extra activity to concerns about safety, but in 30 years of driving on I-75 I have never seen so much concerted police enforcement activity. Methinks the state of Michigan will put a small dent in the ongoing budget deficit this weekend.