We’ve been known to get more than a little irked when we notice people idling their vehicles unnecessarily, like at drive-thrus or school pick-ups. It wastes gas, it pollutes the air, it stinks and it’s just, well, unnecessary. But some drivers get a free idling pass, right? Don’t refrigerated trucks, utility vehicles, safety and emergency vehicles and long-haul trucks often need to keep their engines running to power auxiliary functions? Yes, and no. Here, we explain.