WOODBRIDGE, Va. — A pilot test designed to improve commuter bus fuel efficiency was so successful that the Potomac and Rappahannock Transportation Commission, PRTC, is now proceeding to retrofit more than two dozen buses with the technology.
Pilot testing began last fall, when PRTC agreed to partner with Engineered Machined Products Inc., EMP, on a first-ever test in which EMP engineered and installed its Mini-Hybrid radiator cooling equipment on one of PRTC’s commuter buses. EMP’s equipment was previously tested on conventional transit buses, (those that travel at relatively low speeds and make frequent stops), yielding such impressive fuel efficiency savings that the cooling system is now used by a number of transit systems that operate conventional transit buses, including PRTC. But the cooling system had never been tested on a motor coach that typically operates at higher speeds for longer distances, such as the buses that make up the majority of PRTC’s fleet.