See also http://www.stopthesoot.org/sts-idle.htm
N.J.A.C. 7:27-15.8 Idle standard for Gasoline Powered Vehicles
(a) No person shall cause, suffer, allow, or permit the engine of a gasoline-fueled motor vehicle to idle for more than three consecutive minutes if the vehicle is not in motion.
(b) The provisions of (a) above shall not apply to:
1. Autobuses while discharging or picking up passengers;
2. Motor vehicles stopped in a line of traffic;
3. Motor vehicles whose primary and/or secondary power source is utilized in whole or in part for necessary
and definitively prescribed mechanical operation other than propulsion
4. Motor vehicles being or waiting to be examined by State or Federal motor vehicle inspectors;
5. Emergency motor vehicles in an emergency situation;
6. Motor vehicles while being repaired;
7. Motor vehicles while engaged in the process of connection, detachment or exchange of trailers; or
8. Motor vehicles manufactured with a sleeper berth while being used, in a non-residentially zoned area, by
the vehicle's operator for sleeping or resting.
N.J.A.C. 7:27-14.3 Idle Standard for Diesel Powered Vehicles
(a) No person shall cause, suffer, allow, or permit the engine of a diesel-powered motor vehicle to idle for more than three consecutive minutes if the vehicle is not in motion, except:
1. A motor vehicle that has been stopped for three or more hours may idle for up to 15 consecutive minutes
when the ambient temperature is below 25 degrees Fahrenheit; and
2. A diesel bus while it is actively discharging or picking up passengers may idle for 15 consecutive minutes
in a 60-minute period.
(b) The provisions of (a) above shall not apply to:
1. Any motor vehicle idling in traffic, or a motor vehicle other than a school bus idling in a queue of motor
vehicles, that are intermittently motionless and moving because the progress of the motor vehicles in traffic
or the queue has been stopped or slowed by the congestion of traffic on the roadway or by other conditions
over which the driver of the idling motor vehicle has no control;
2. A motor vehicle whose primary power source is utilized in whole or in part for necessary and definitively
prescribed mechanical operation other than propulsion. This use includes, but is not limited to, operating lift
gate pumps and controlling cargo temperature. This exemption does not apply to passenger compartment
heating or passenger compartment air conditioning;
3. A motor vehicle being or waiting to be examined by a State or Federal motor vehicle inspector;
4. Vehicles that are actively performing emergency services. Examples include fire vehicles, police vehicles,
public utility vehicles, military tactical vehicles and snow removal vehicles, during the time that such vehicles
are actively performing emergency services;
5. A motor vehicle while it is being repaired or serviced, provided that operation of the engine is essential to
the proper repair or service;
6. Subject to (b)7i below, on or before April 30, 2010, a motor vehicle, manufactured with a sleeper berth,
while it is being used, in a non-residentially zoned area, by the vehicle’s operator for sleeping or resting,
unless the vehicle is equipped with a functional auxiliary power system designed in whole or in part to
maintain cabin or sleeper berth comfort or to mitigate cold weather start-up difficulties;
(c). Beginning May 1, 2010, a vehicle equipped with a sleeper berth, which vehicle is (a) No person shall cause,
suffer, allow, or permit the engine of a diesel-powered motor vehicle to idle for more than three consecutive
minutes if the vehicle is not in motion, except:
1. A motor vehicle that has been stopped for three or more hours may idle for up to 15 consecutive
minutes when the ambient temperature is below 25 degrees Fahrenheit; and
2. A diesel bus while it is actively discharging or picking up passengers may idle for 15 consecutive minutes
in a 60-minute period.
(d) The provisions of (a) above shall not apply to:
1. Any motor vehicle idling in traffic, or a motor vehicle other than a school bus idling in a queue of
motor vehicles, that are intermittently motionless and moving because the progress of the motor
vehicles in traffic or the queue has been stopped or slowed by the congestion of traffic on the roadway or
by other conditions over which the driver of the idling motor vehicle has no control;
2. A motor vehicle whose primary power source is utilized in whole or in part for necessary and definitively
prescribed mechanical operation other than propulsion. This use includes, but is not limited to, operating lift
gate pumps and controlling cargo temperature. This exemption does not apply to passenger compartment
heating or passenger compartment air conditioning;
3. A motor vehicle being or waiting to be examined by a State or Federal motor vehicle inspector;
4. Vehicles that are actively performing emergency services. Examples include fire vehicles, police
vehicles, public utility vehicles, military tactical vehicles and snow removal vehicles, during the time that such
vehicles are actively performing emergency services;
5. A motor vehicle while it is being repaired or serviced, provided that operation of the engine is essential to
the proper repair or service;
6. Subject to (b)7i below, on or before April 30, 2010, a motor vehicle, manufactured with a sleeper berth,
while it is being used, in a non-residentially zoned area, by the vehicle’s operator for sleeping or resting,
unless the vehicle is equipped with a functional auxiliary power system designed in whole or in part to
maintain cabin or sleeper berth comfort or to mitigate cold weather start-up difficulties; equipped with a
model year 2007 or newer engine, or has been retrofitted with a diesel particulate filter that is connected and
properly functioning.
7. If the Commissioner, after consulting with the New Jersey Department of Transportation and the State
Police, determines that public safety would be adversely affected if the exemption in (b)7 above were to
take effect on May 1, 2010, the Commissioner may, by notice published in the New Jersey Register on or
before May 1, 2010, delay the operative date of the exemption in (b)7 above, and extend the exemption
in (b)6 above, for up to one year, but in no case may the exemption of (b)6 above be extended beyond
April 30, 2011; or
8. The operation of technology designed to reduce engine idling, such as auxiliary or alternate power units
(APUs), generator sets, and bunk heaters, provided the vehicle’s main engine is not operating.
(e) Beginning May 1, 2008, no person shall cause, suffer, allow, or permit the engine of a diesel-powered motor vehicle to idle for more than three consecutive minutes when that vehicle is parked in a parking space with available electrification technology.
(f) In no case shall the provisions of (a) and (b) above relieve any person from compliance with N.J.A.C. 7:27-5, Prohibition of Air Pollution, or any other applicable local, State, or Federal law.