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Like I said, reducing the traffic congestion that busses deal with will speed them up. However, it is completely unavoidable that if there are 30 people on the bus at all times, the average person will have to wait for 30 people to board and 30 people to get off. That could mean 60 stops, or it could mean one stop where everyone gets off and everyone gets on. Obviously the second one is faster, but reducing stops also means people have to walk further, which increases travel time. Except in extraordinarily dense cities, the iron math of transit is that if you want to have 30 people on a bus, you're going to have to make people do some walking, they're going to have to wait a little while for a bus, and even without any congestion, they're not going to go very fast because of all of the stopping. That makes the door to door time very unfavorable relative to driving, and so except in those extraordinarily dense cities, very few people that can afford a car use transit. Because there are a bunch of people on the bus, getting on and off has to be hurried and stressful, because you're making 30 people wait. This is particularly annoying if you're traveling with luggage or kids. The environmental benefits of transit are potentially big, but let's do the math. A city bus gets about 3.3 MPG (https://afdc.energy.gov/data/10310) It's low mostly because the bus is so heavy and has to stop so frequently. If you have 30 people on the bus, it's about 100 passenger miles/gallon. The average car is about 24 MPG. If you have 4 people in it, it's 96 MPG. If you have 1 person in it, it's 24 MPG, so we can see that the big efficiency benefit of putting people together happens with just a few people. Smaller vehicles are also more flexible. The city bus that is running full at rush hour is also running with 2-3 people on it at 10 at night. It might be getting 6 MPG with less stopping, but it's very wasteful to run such a large vehicle almost empty. Smaller pooled vehicles can still run relatively full in off hours, and the extra capacity sits parked not using any energy. My point overall is that transit just gets much better in basically every dimension if you reduce the number of passengers per vehicle. The only reason transit agencies aren't doing this now is the cost of the drivers. Even with the cost of the drivers, UberPool is a similar product with non purpose built vehicles that has been fairly successful. If you took out the cost of the driver and reduced the ride price accordingly, it would dominate passenger transportation. |