I think that number is not just looking at the personal transportation but at transportation as a whole, from a systems perspective at the community level. There is an immense amount of inefficiency in that system, so we have to look at it from the personal-vehicle side, from fleets, from the sort of return-to-base-type vehicles, and then from the sort of inside-one-city goods movement as well. We need to look at it from all of those different perspectives. Electric vehicles do have a role, but I don't think that's the only solution for that sort of transportation, from a systems perspective at the community level. I think we need to look at what the opportunities are with public transit systems and how they interrelate with personal vehicles, and we also need to look at the fleet opportunities as well.
On November 1st, 2018. See this statement in context.