Mass Interstate Toilet Etiquette. It's The Law!
Wow. This really put a damper on my bathroom stall plans. After cleaning up with some wipes, I had hoped to wash my hair, get rid of some expired aspirin, dispose of that bacon grease I had been carrying around in my jacket pocket for weeks, and finally say goodbye to the boxes of books I had in my trunk.
But seriously, I don't think this bathroom edict goes far enough. I would add other items one may have in the car and want to toss at the interstate rest stop toilet area. These items include cigarette butts, vodka bottles, chatty passengers, pizza boxes, old lottery tickets, and ex-husbands (I threw that one if for my pal Stiffy).
So remember, when you stop to relieve yourself in Massachusetts, you can park your ass but don't flush your trash.