He claims roads are efficient. I'm not so sure. Even a small 2-seater has a lot of space around the (typically) single occupant. To say nothing of the wasted space between vehicles when traveling at speed. When riding a motorcycle you can easily ride between cars laterally as well.

Of course, train tracks are also vacant almost all of the time, but when there is a train, the passengers are packed much closer together than in a typical road vehicle.

He also equates space with comfort but doesn't seem to consider the 2nd-order consequences. More roads, more space on roads, more space between things, and more infrastructure to accommodate cars shifts people from walking and cycling and so on, to cars, because the distances become greater. It's a kind of zero sum game. I wonder if the author would consider THIS demand-shifting to be "induced demand"?