It's just like every other law in ny.
Break it at the wrong time and wrong place and they'll get you.
For instance today they crack down on drivers using cell phones.
Why not crack down every day?
I see drivers making illegal turns and u-turns right in front of police cars and not get stopped.
Then there are the "traps" where a sign is not easily seen and they post a cop there every day pulling over driver after driver.
They would never move the sign.
They just keep ticketing people until everyone knows the spot.