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Article: Going head to head: NREL compares hybrids and diesels in study using Seattle's King County Metro transit fleet.(TECHNOLOGY OF CLEAN AIR)
- Article from:
- Diesel Progress North American Edition
- Article date:
- April 1, 2007
- Author:
CopyrightCOPYRIGHT 2007 Diesel & Gas Turbine Publications. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Hybrid electric buses have long been touted as being cleaner and more fuel efficient than conventional diesel buses. Now a study conducted by the U.S. Dept. of Energy's NREL provides some qualitative data to support that belief, as it evaluated similar diesel and hybrid articulated buses operating under similar duty cycles.
King County Metro Transit (KC Metro) in Seattle, Wash., operates 235 hybrid electric articulated buses in its fleet of 1400 standard and articulated buses, trolley buses and streetcars that service the 2134 sq.mi. Seattle/King County region. This is the largest use to date of the GM Allison EP50 parallel hybrid propulsion system, and 20 more ...