Ok, lets see, Diesel Fuel is in Excess of $4.00 per gallon, an Ideling Diesel Truck uses approx 1 gal. per hour ideling at std. Idle, and more if on High Idle to keep warm in the winter or Cool to sleep in the Summer. The large trucking companies can and are setting the idle time on a truck to approx 5 then it automatically shuts down, this decreases wear on the internal parts of the engine to let them cool from on-road use. This law is not necessary, it is based on old technoligy, and old sterotypes of Diesel Engines, the new 2010 and newer Diesel engines emit cleaner air than the air they take in.. So this law is only going to generate revenue for the Governmental entitiy where the un-educated public have the power to issue citations....