Plenty of families don't actually need N cars. They can probably get by with N-1 and summon another when needed.
Also, one car can do multiple errands without a driver, eg drop someone off at work, drop the kids off at school, and then go stage somewhere until needed.
In Europe entire families usually share just one car. Some cities like Jena, Germany (<100k) have 4 tram lines and three inter-city rail stations (1 that serves a high speed ICE train). That famous city from the song, Chattanooga, no longer has a (functional) passenger rail station at all.
>In Europe entire families usually share just one car.
Yet, in the case of France, the number of cars per household keeps rising; the share of households owning 2 cars, owning 3 cars, keep rising as well; in spite of the decrease of the size of households (the number of people per household).
To add insult to injury, car owners have become so lazy that don't bother parking their cars in their garage or their yard. Nope, that's out of fashion, now they park them on the public space: streets, roadsides, side-walks, etc. It's like witnessing an invasion, it spreads everywhere.
Plenty of families don't actually need N cars. They can probably get by with N-1 and summon another when needed.
Also, one car can do multiple errands without a driver, eg drop someone off at work, drop the kids off at school, and then go stage somewhere until needed.