The list below contains summaries of all Maryland incentives and laws related to Idle Reduction.
A motor vehicle engine may not operate for more than five consecutive minutes when the vehicle is not in motion, with the following exceptions: 1) traffic conditions or mechanical difficulties; 2) operation of heating, cooling or auxiliary equipment installed on the vehicle; 3) to bring vehicle to manufacturer's recommended operating temperature; or 4) if idling is necessary to accomplish the intended use of the vehicle. (Reference Maryland Statutes, Transportation Code 22-402)