Breakdown lanes may also end without warning causing traffic jams as people merge back in. Similarly, never attempt to give hand signals. Boston drivers, unused to such courtesies, will think you are waving them on to pass you. It is a warning to speed up and get through the intersection before the light turns red. As a result, yellow lights only light for a quarter of a second.
Sidewalks are optional.
In making a left turn from the right lane, employ the element of surprise. That is, do it as suddenly as possible, so as to stun other drivers. Crossing entire 4 lane roads in one block always gains the respect and salutes.