I was coming back from Bean town to CT just cruising in the left lane when I see party lights behind me. I was doing 70 in 65 so I thought it was wierd that I was getting pulled over. Trooper comes over asks for the usual stuff, I tell him up front that my registration is expired beause i'm in the process of moving back to NY and havent had the time to make a trip to the DMV. Anyway, he tells me that in Massachusites there is a left lane law which means on any multi lane road you cannot be in the left lane if the right lane is open if that makes any sense and he said it was reserved for emergency vehicles and that I had to keep to the right in MA. I of course apologized and told him I did not know that, he was cool about it said it's fine he saw my out of state tags and just wanted to give me a heads up for future reference. He even gave me a break on my registration for telling him up front, so you learn something new everyday.