Two hybrid buses with engines that reduce both carbon and CO2 emissions and use less fuel were added to the fleet in 2011. The additional capital cost for the upgrade to a hybrid engine on one of the buses was funded by a grant from Greenhound; the second hybrid bus was funded by the American Recovery and Reinvestment Act (ARRA). These two buses complement the other environmentally friendly, low sulfur diesel vehicles in the fleet.

NRTA’s diesel engines for the entire fleet meet the most current emissions requirements from the Environmental Protection Agency by using ultra low sulphur diesel (ULSD) fuel, and being equipped with particular filters which remove pollutants from the exhaust.

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