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A recent study conducted by Pike Research found that hybrid powertrains will find a home in some 300,000 medium- (MD) and heavy-duty (HD) trucks and buses by 2015. The study also finds that while North America currently leads the world in usage of hybrid trucks, Asia is expected to take the lead as early as next year and will probably never look back. Here are some of the study's highlights (some very specific):

Proterra electric bus – Click above for high-res image gallery

Luxembourg's bus operator Sales-Lentz has announced the purchase of 6 brand new 7700 hybrid Volvo buses. This is the first firm purchase order of the recently-released model and means the first unit will hit the streets by the end of 2009, with the remaining five coming in 2010. The contract was signed in front of the Luxembourger Minister of Environmental Affairs, who considers the widespread use of hybrid buses a key step to curbing the small country's carbon emissions as well as reducing nois

The National Renewable Energy Laboratory has just completed a two-year study of the hybrid buses being operated by Long Beach Transit in southern California. Unlike most transit systems using hybrid buses, Long Beach has been using a system that combines a gasoline engine with a series hybrid system. The ISE ThunderVolt hybrid uses a Ford 6.8L V10 running at constant speed to turn a generator that provides juice to a pair of electric motors. Only the motors drive the wheels. Instead of batteries

Hampton Roads Transit provides mass transit services in the region of Virginia that includes Norfolk, Virginia Beach and several other communities. The company has decided to replace an existing fleet of trolleys in Virginia Beach and battery-powered shuttle buses that run in a loop around downtown Norfolk with hybrid buses.