http://www.cggc.duke.edu/environment/cli...

Typical average costs for buses on page 6

"Battery Electric Vehicles (BEV): BEV vehicles run solely on batteries that must be recharged on the grid. The only pollutants from a BEV are those resulting from generating the electricity used to recharge the battery. BEVs are distinguished from electric trolley buses, which are powered through overhead cables. Proterra, a firm developing a BEV transit bus, plans by June 2010 to have infrastructure in place for the Foothills Transit Agency, operating in the San Gabriel and Pomona Valleys in California, with four more cities to come online afterwards. Apart from Foothills Transit and MTD Santa Barbara, no other transit authorities run full-size BEV transit buses yet, although Proterra aims to expand the market (Goldman, 2009)."
---> If this is true, it means most transit will buy the plug-in hybrid (probably diesel) from Proterra.

"The U.S. market for heavy-duty transit buses is small, currently delivering 5,000 to 5,500 buses per year."

"Transit Bus Market Overview
The global transit bus market is small, but growing. Transit buses account for roughly 18% of a total global bus market of 324,000 buses3 (including motor coaches, school buses, and all other bus types)."

"Major components. The engine is the single most expensive component in a transit bus, accounting for roughly 20% of the total cost of a finished bus."