[falcolas]

Consider this comparison: buses carrying 50 people each on I-66 going 60mph. Which is going to carry more people into DC, at what cost? Think of the station wagon filled with hard drives vs. gigabit internet.

Cars, unless going ungodly fast (140mph is not enough), are inefficient at throughput.

[Retric]

You can design a bus for these tunnels fairly easily. However, 140mph under a city vs 3 mph at street level and buses lose unless they have 47+ passengers but a 50 passenger bus costs 2-3 car slots easily so it's a wash.

PS: I-66 really does have 3mph traffic as it will take 30+ minutes to travel 10 miles. As in I was happy if that part was under 30 minutes, and not surprised if it took 40 minutes as the average was well over 30.

[imron]

> Consider this comparison

Rendered moot by the fact that large numbers of people prefer the privacy and convenience of a car.

Musk's solution takes the human condition in to account.