Quite large, certainly a good chunk of the population that currently drives. There's also a segment of the public transit riding population that would prefer pe

Quite large, certainly a good chunk of the population that currently drives. There's also a segment of the public transit riding population that would prefer personal transit, but do not have the option. People generally prefer to a) be comfortable, and b) proceed directly from point A to B with no interstitial bullshit. You almost never get b) with public transit as commonly realized today.