EPA: Environmental Protection Agency
EPA Non-attainment Area: an area that has not met EPA standards for levels of the pollutant ozone. States containing non-attainment areas are required to develop plans for meeting the required standard.
Idling: the operation of an engine in the operating mode where: (a) the engine is not engaged in gear; (b) the engine operates at a speed at the revolutions per minute specified by the engine or vehicle manufacturer for when the accelerator is fully released; and (c) there is no load on the engine. (City of Arlington, Texas Amended Ordinance 08-076, 9/16/08)
GVWR: gross vehicle weight rating - the maximum allowable total weight of a road vehicle or trailer when loaded, i.e. including the weight of the vehicle itself plus fuel, passengers, cargo, and trailer tongue weight.
NTCOG: North Texas Council of Governments
TAC: Texas Administrative Code
TCEQ: Texas Commission on Environmental Quality