I didn't see any sign holders last night on 6th ave... I saw one truck with the lit up <<< sign, two smaller trucks with flashing yellow light bars, and then a Chevy Caprice Retired Police car with a construction worker sitting in the drivers seat that had an LED Code3 (I assume) light bar (Red and blue) flashing... The truck with the <<< sign looked as if it would shred even a Ford F350's front end if they were to violently meet.