What's going on with these speed liMits


Im from Michigan and sometimes I go through Canada to get to Buffalo. Ive been lucky so far but I usually do a little under the speed limit through Canada.. its posted at 100mph right?
 
Yeah Idaho. 80 is legal but the state police say they are going to give less tolerance than when we were at 75. 80 to 90 was kind of normal out on the rural freeways anyway. We'll see ?