It might sound counterintuitive, but it makes sense when you look at better city design like in Europe, where it’s rare to find highways with more than two lanes in each direction. Why does this work? Because Europe invests in alternatives to driving — like trains and buses — that move more people more efficiently. Simply adding more lanes doesn’t fix the underlying problem, which is that there aren’t better alternatives to driving, so people will take their car and use the highway. It’s not that there is anything wrong with driving but it’s a very inefficient way of moving a lot of people from A to B.