The induced demand argument applies to marginal increases in capacity on already-congested roads. If you make enough extra capacity, eventually you run into lim

The induced demand argument applies to marginal increases in capacity on already-congested roads. If you make enough extra capacity, eventually you run into limits in how much demand can be created. For example, if you check out the city streets at 3 AM, you'll typically find that there's a lot more capacity than people are using. These guys are quite ambitious in the scale of the tunneling they want to do.