I finally sucked it up and went to the Registry of Motor Vehicles in Plymouth to get my MA drivers license and plates for the car. I was first in line when they opened and it took almost an hour to do all the paperwork, but I'm officially a resident now.
Which means as a Cape Codder, I can use this little known, residents-only shortcut. lol ;D
Much to our chagrin, there really is no alternate route for residents to get on and off the Cape. There is no tunnel under the Canal. We must use the 2 bridges just like everyone else. But this postcard, and the accompanying "permit stickers", are a very popular souvenir item.