To go along with what chiefofgxbxl wrote, this circumstance need not be the case. It is possible to reallocate more of our limited road space to more efficient ways of moving people instead of concentrating on simply moving cars. This has the effect of bringing transport on par with, or ahead of, driving alone.
Where I live, my commute to work by bus is only 7 minutes slower than doing the same commute driving myself alone. And for those 7 minutes, I do not have to pay any attention except once to remember to get off at the appropriate stop for a transfer. (I could avoid the transfer by walking but I'm not that motivated.) And I am not concerned with not being able to rush out for an emergency because my employer, or my county if my employer did not offer this benefit, will call me a taxi if I need to leave in a hurry and arrived to work without driving myself.
Because the bulk of my transport needs are now handled, I can also see what the transport network can do for me in other areas. As of two years ago, my family moved to a place in our city where we need not own a car, so we sold our last one. If we desire one for a few hours or a day, there are services (far cheaper than the few hundred dollars per month required to maintain one for our exclusive use) that will provide one upon request. They even take care of fuel.
We can make these choices to wean from cars; we choose not to. And at what cost to ourselves, our neighbors, and our planet?