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Self-driving tech would make vehicle sharing much easier, which would in turn allow people to use vehicles properly sized for their current need. In other word

by cxseven 10y ago

Self-driving tech would make vehicle sharing much easier, which would in turn allow people to use vehicles properly sized for their current need. In other words, people wouldn't need a big honkin' SUV or truck most of the time, and could ride around in something smaller with just the fuel range they need for that trip. Also, traffic might get better. If everything became automated it might even be possible to eliminate traffic lights.

trome 10y ago
There would likely be vehicle sharing benefits, but self driving cars are apt to make traffic worse. Your average 8 lane freeway will still only be able to carry 11k cars an hour assuming everyone has minimal stopping distance & is driving at 40mph for ideal throughput. Traffic lights are also unlikely to disappear, as self driving cars do not magically get perfect traction or stopping abilities, and they will have to share the road with the other humans that exist on our streets, whether they be pedestrians, bikers, joggers, skateboarders, etc. In contrast, a light rail alignment can move 20k people an hour. It also won't reduce traffic, but it'll slow traffic growth by reducing latent transport demand and allow cities to remain economically viable as traffic increases.
- agumonkey 10y ago
  The notion of traffic will probably shift if energy becomes cheap and navigation doesn't require human attention. You don't need shortest path, and can redirect flow freely in smaller places. Unless you're in a hurry.
  - trome 10y ago
    Unlikely, at peak times most alternate routes are already at or above capacity, energy & navigation dropping in cost will not make more road capacity suddenly appear, and the point of diminishing returns with road capacity is very low. When you try to ignore that you end up like Atlanta, which is no joy.
- cxseven 10y ago
  Even with a light, the self-driving vehicles could use precise knowledge of the signal's timing to coast towards the intersection at just the right speed so that they don't have to fully stop and waste momentum.

by cxseven 10y ago

trome 10y ago

There would likely be vehicle sharing benefits, but self driving cars are apt to make traffic worse. Your average 8 lane freeway will still only be able to carry 11k cars an hour assuming everyone has minimal stopping distance & is driving at 40mph for ideal throughput. Traffic lights are also unlikely to disappear, as self driving cars do not magically get perfect traction or stopping abilities, and they will have to share the road with the other humans that exist on our streets, whether they be pedestrians, bikers, joggers, skateboarders, etc. In contrast, a light rail alignment can move 20k people an hour. It also won't reduce traffic, but it'll slow traffic growth by reducing latent transport demand and allow cities to remain economically viable as traffic increases.

agumonkey 10y ago
The notion of traffic will probably shift if energy becomes cheap and navigation doesn't require human attention. You don't need shortest path, and can redirect flow freely in smaller places. Unless you're in a hurry.
- trome 10y ago
  Unlikely, at peak times most alternate routes are already at or above capacity, energy & navigation dropping in cost will not make more road capacity suddenly appear, and the point of diminishing returns with road capacity is very low. When you try to ignore that you end up like Atlanta, which is no joy.
cxseven 10y ago
Even with a light, the self-driving vehicles could use precise knowledge of the signal's timing to coast towards the intersection at just the right speed so that they don't have to fully stop and waste momentum.