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Some of the country’s largest transit fleets are accelerating their alternative-fuel programs, with CNG, clean diesel and hybrid buses leading the pack. Meanwhile, fuel-cell propulsion remains in development.
Read More →A recent audit of Albuquerque, N.M., SunTran's compressed natural gas buses questioned their reliability, safety and maintenance costs. It is another example of a growing skepticism about the operational practicality of CNG.
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