As we have been discussing, the US National Blueprint for Transportation Decarbonization breaks the Transportation sector into seven categories, each of which has its own targets for emission reduction/elimination, and strategies for how those declines in emissions will be achieved. The next category addressed in the Blueprint by emissions % is Off-Road Vehicles and Mobile Equipment.
The Off-Road Vehicles and Mobil Equipment segment includes a LOT, from heavy mine drilling equipment and excavators to dirt bikes and lawn mowers. The off-road segment is accountable for approximately 10% of emissions, but where 79% of the segment uses diesel, the changes that would be applicable to the medium and heavy duty (on road) sector would carry over fairly cleanly to the off-road sector, which is why they make sense to address in tandem. We saw a similar approach to this with the transition to ultra low sulfur diesel – the initial priority was on road vehicles, as they are more uniform in fuel technology requirements and also contribute more on emissions. Once the tech is there for on-road, its fairly simple to adopt it down into the off-road sector for diesel fueled equipment.