The trucking industry is experiencing three phases of powertrain development being driven in part by the Phase 2 greenhouse gas (GHG) regulations, which mandate fuel economy improvements for commercial trucks. That’s what Mike Roeth, executive director  of the North American Council for Freight Efficiency, will tell you. “We’re already through the ‘smart’ phase, where the engine, transmission, and even the axles now include built-in intelligence of a ...

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