It doesn't say "significantly reduce car usage" it says "reduce carbon emissions by fundamentally changing car use". In the PR post two savings mentioned are "

It doesn't say "significantly reduce car usage" it says "reduce carbon emissions by fundamentally changing car use". In the PR post two savings mentioned are "highway trains" and car sharing. Car sharing gets interesting if the car can drive by itself to pick up the next person, to leverage all the normal downtime in a typical day where your car is just sitting there waiting for you to use it next.