3 ms·
This analysis ignores the fact that the two modes (bus and AVs) load and discharge passengers very differently. The problem is not only the physical space AVs t
by williamsmj 8y ago
This analysis ignores the fact that the two modes (bus and AVs) load and discharge passengers very differently. The problem is not only the physical space AVs take when in motion on the road. See, e.g. https://www.theatlantic.com/technology/archive/2018/10/bus-best-public-transit-cities/574399/ https://www.theatlantic.com/technology/archive/2018/10/bus-b...
“How many people’s doors can a driver get to in an hour, including the minute or two that the customer spends grabbing their things and boarding? The intuitively obvious answer is the right one: not very many. An Eno Foundation report promoting microtransit could not cite a case study doing better than four boardings an hour of service. John Urgo, the planner of demand-responsive service for AC Transit in Oakland, California, has said that seven boardings an hour is “the best we hope to achieve.” Few fixed-route buses perform that poorly. Across sprawling Silicon Valley, for example, fixed-route buses carried 12 to 45 people an hour in 2015. In a dense city such as Philadelphia, the number can exceed 80”
Door-to-door transit simply cannot achieve the throughput of buses! Which is not to say door-to-door would not be profitable or even have a role in a mass system. It's probably an improvement over the current dominant mode (although my suspicion is that it's simply a slightly less bad local minimum).
But the point of the original article is to argue that certain groups of people (decision makers in cities, mostly), should not extrapolate from their own needs and preferences when designing a system designed for mass use, because they're by definition unusual and they're each N=1
- nostrademons 8y agoThat whole Atlantic article is predicated on the main cost of a ride being the driver's time. Get rid of the driver and you get rid of that cost. Get rid of the internal combustion engine (which has large economies of scale - one big engine works more efficiently than many small ones) and you lose the fuel advantage - many small electric engines are just as efficient as one big one. The boarding issue in the article is mostly in reference to the driver's time, but there's a simple solution for the rider: docking, not board. Board a pod once, at your door, and travel inside it until you reach your destination. If you need to switch modalities - like latching a number of pods together into a train for long road trips, or putting them on an aircraft - you load the pods onto the plane, you don't transfer the people between pods. It's like intermodal containers for passengers, with the nice benefit that you can continue working on your laptop or watching a movie or sleeping throughout modality switches.