http://ngtnews.com/derry-township-school-district-deploys-propane-school-buses/
http://archive.is/iYSyH
Derry Township School District (DTSD) in Pennsylvania has introduced three new school buses fueled by propane autogas into its fleet for the 2015-2016 school year. The Blue Bird Propane Vision buses are equipped with propane autogas fuel systems manufactured by ROUSH CleanTech, and the buses are reportedly already saving the Derry Township money.

“It’s our department’s goal to save money in transportation costs that can be used for better purposes. Our normal preventative maintenance will cost about $240 less per bus per year with the propane autogas buses,” says Steve Bell, director of transportation and garage operations for DTSD. “The down time and other repair costs will definitely be less than our diesel buses.”
Along with being fiscally responsible, Bell says the school district’s use of more environmentally friendly buses fits well into the district’s efforts to reduce its carbon footprint.