Comment by Tiktaalik

9 years ago

Because cars, which are relatively wasteful spacewise, create negative externalities on the public transportation by causing congestion, which resultantly makes public transportation less efficient.

Not an issue in automated underground systems really.

  • Yes it is. Cars don't even begin to match the capacity of trains. Look at London or Singapore where trains arrive less than a minute apart at peak hour. Many of London's trains are autonomous and all of Singapore trains are fully autonomous. There is no way individual cars could even come close to matching that kind of people-moving ability.