2009 New Jersey Code
TITLE 39 - MOTOR VEHICLES AND TRAFFIC REGULATION
Section 39:4
39:4-122 - Signal by police whistle

39:4-122.  Signal by police whistle
    A driver shall, upon one blast of a police whistle given by a police officer  with hand raised, bring the vehicle to a full stop, and shall not proceed again  until he receives a signal so to do from the officer.  Three or more blasts of  the police whistle is the signal for alarm and indicates the approach of a fire  engine or other danger.
 

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