Section 250-RICR-120-05-45.4 - DefinitionsA. Unless otherwise expressly defined in this section, the terms used in this regulation shall be defined by reference to Part 0 of this Subchapter (General Definitions). As used in this regulation, the following terms shall, where the context permits, be construed as follows: 1. "Diesel engine" means a compression ignition type of internal combustion engine.2. "Diesel motor vehicle" means a vehicle powered by a diesel engine but shall not include non-road diesel engines, auxiliary power units on on-road motor vehicles, or stationary diesel engines.3. "Idling" means the operation of the engine while the vehicle is stationary or the piece of non-road equipment is not performing work.4. "Non-road diesel engine" means a diesel engine intended for use off public highways or in other similar applications, and include, but are not limited to, diesel engines in: farm vehicles, locomotives, aircraft, marine vessels, construction equipment, airport ground support equipment, commercial and industrial equipment.5. "Unnecessary idling" means idling which does not meet one of the exemptions listed in § 45.8 of this Part.250 R.I. Code R. 250-RICR-120-05-45.4