Federal go-ahead comes with 190 legally binding conditions attached.
Will be used in the automakers new two-litre, direct injection, four-cylinder Drive-E powertrain.
Buses are expected to be delivered by the first quarter of 2014.
Bi-fuel system offers a combined fuel range up to 1040 km.
Westport Innovations’ on-board natural gas storage tanks optimized for spark-ignited engines.
Encana Natural Gas Inc. has opened a compressed natural gas (CNG) station in Strathmore, Alta. to serve its own natural gas-powered vehicles and to encourage others to switch to the cleaner-burning fuel.