Originally Posted by Jooseppi Luna

Also, in MA, with the exception of the Turnpike and roads owned by the DCR, all speed limits are Primae Facie, meaning that operating above the speed limit is not illegal, but just considered evidence that you are violating the Commonwealth's rule that all vehicles must operate at a "reasonable and prudent" speed. If you can show in court that the speed you were doing was, in fact, reasonable and prudent, you are considered acquitted. Now, how often does somebody actually win a ticket case based on that? Probably not that often. Still, it's an interesting trivia point.