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You just described the pure software world solution. What happens when the commuter I pick up vomits in my car? Or steals something from my car? What happens if I get picked up by a person who changes their mind about where they're going? Or decide to take an unplanned detour to go to the store, or back home to grab the laptop they forgot, or to score some heroin? What happens when the driver gropes me? Or I grope th…
This is exactly how Uber turned into a taxi service. They tried ridesharing, it turns out that people in cars do sketchy things and piss each other off, or worse. I would rather see local grassroots organizations take on this project.
Looking at this, i would think that if (and I'm certainly not saying it would/will happen) car-pooling became enabled and socially popular, it presumably both has naturally thinner margins than a taxi service, plus take out significant demand for individual trips from the likes of a taxi service.