Speed limits are arbitrary figures, given only as suggestions, and are apparently not enforceable during rush hour. Just because you're in the left lane and have no room to speed up or move over doesn't mean that a Long Island driver flashing his high beams behind you doesn't think he can go faster in your spot. Always slow down and rubberneck when you see an accident, or even if someone is just changing a tire. It is assumed that state police cars passing at high speed may be followed in the event you need to make up a few minutes on your way to work, or the beach. Learn to swerve abruptly.
Long Island is the home of high-speed slalom driving thanks to potholes.
It is traditional in Long Island to honk your horn at cars that don't move the instant the light changes. Seeking eye contact with another driver revokes your right of way, except in Garden City where it acts as an invitation to duel or play chicken. Never take a green light at face value. Always look right and left before proceeding. In Long Island it is common to stop and then decide which direction to turn.