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This assumes the only limit is congestion, which it isn't. E.g. roads near me will soon be 20mph to intentionally make it undesirable to use them for through traffic past peoples houses, and to reduce pedestrian accidents. In Central London, 3x means maybe reaching 30mph, but increasing parts of Central London are also getting 20mph, and while it might very well be that safer automated cars would make it viable to bring that back up to 30mph, you can't travel in a straight line or anything resembling it in the most central parts of London. E.g. in the most central part there is a single road covering the city centre East/West (Oxford Street), which is also restricted to taxis and buses (and it's still one of the most congested roads in town). To travel the same distance East/West, you need to drive a substantial distance along heavily congested roads South/North, or drive through a maze of smaller back streets and deal with traffic lights and pedestrians haphazardly crossing all over the place, so actual speed measured by straight line between starting point and destination is a tiny fraction of the driving speed for a lot of locations in the centre... It's not uncommon for it to be faster to walk even when there isn't much congestion, depending on where you are going from/to. So while there may be plenty of places where being able to fly won't be worth it, there are certainly also locations where "just" 100mph would still beat even automated cars by several times if you don't need to spend time driving somewhere dedicated to take off/land. This latter is the biggest caveat - if your "flying car" is really a "drivable convertible plane" that needs something resembling a runway, a heavily congested city core won't exactly be ideal. Though saying that, even my old commutes in to London were far slower on average than 100mph when taking the bus + train, despite bus + train beating driving a regular car by a massive margin, and that was between locations with far less congestion than the centre. |