It really depends on if we continue down personal car ownership or not. If not, then you can get pretty close to double throughput by appropriately sizing cars

It really depends on if we continue down personal car ownership or not. If not, then you can get pretty close to double throughput by appropriately sizing cars and lane splitting. Most trips are just the person without significant baggage. That can be handled by something like this: https://electrek.co/2022/07/25/nimbus-one-50-mph-electric-vehicle/ https://electrek.co/2022/07/25/nimbus-one-50-mph-electric-ve... Which is small enough to split lanes and double capacity. It's also possible that with smart driving cars effectively everyone would be using an Uber like service. That makes it much easier to combine trips and put people into 4-12 sized car buses. If that comes to pass then going from mostly 1 person cars to that would multiply capacity many times.