That's a bit of a tough question. I'm not sure I can put a quantification on it.
Part of it has to do with how long the existing fleet is going to stay on the road and how far ahead the equipment manufacturers are in things that are already in queue, such as the direct injection technology for gasoline, for instance. I think we are all familiar with fuel injection, but fuel injection has been improved to the point where the fuel is going to be injected directly into the cylinder head, compared to going through an injection process. Well, that's going to increase efficiency yet again.
That technology, to my understanding, is already in stream in terms of the planning. I'm not sure in which model year it will come out as an operational thing, but my example is that those things are already in play. Of course, we don't have the inside knowledge as to which technology what company already has in their planning cycle.
I identified three categories. The first was the game changers, as I called them. Electric vehicles are going to change the game. If we actually do have electric vehicles, even with the range challenges we have in them today, and if they are used as local commuting vehicles in town, that potential game changer will be significant in terms of energy use and emissions.
Then there was the planning that's going on now by the OEMs, the equipment manufacturers, in their existing plans. Then there's the legacy fleet.
All three have different parameters associated with them. I suppose I identified all three because to improve energy efficiency and reduce greenhouse gas emissions from automotive transportation, we need to look at all three, but I'm afraid I can't give you a quantification on which one is more or less important.