There is a Dieseling Law I'm told by The American Lung Association in Pennsylvania. Any diesel vehicles dare only idle 10 minutes at a time unless someone is guarding something, like a Brink's Truck.
Odor from their vehicles and diesel equipment is horrendous and makes people cough due to the irritation of the lungs.
This includes diesel dump truck and diesel tree removal equipment and mulching machines.
These tree servicers need to take brush to a specific area to mulch up instead of polluting an entire neighborhood with diesel fumes and saw dust.
These diesel laws are on the books and can be enforced.
This includes diesel 18 wheelers, also.