The Thomas Built Buses Saf-T-Liner® C2 CNG, equipped with the Cummins ISB 6.7 G engine, is the industry’s first Type C bus fueled by compressed natural gas (CNG). The C2 CNG bus offers excellent driver ergonomics and maneuverability along with the best visibility in its class. And, Thomas Built construction standards ensure outstanding safety and long-term durability. Plus, CNG creates up to 13% less greenhouse emissions than diesel. So, if you’re looking for a greener version of your favorite yellow bus, talk to your Thomas Built dealer. They’ll help you make the best alternative fuel decision for your fleet and even advise you on how to set up alternative fuel infrastructure.