On January 6, 2023, the New York Times asked, "Widening Highways Doesn’t Fix Traffic. So Why Do We Keep Doing It?" 

“It’s a pretty basic economic principle that if you reduce the price of a good then people will consume more of it,” Susan Handy, a professor of environmental science and policy at the University of California, Davis, said. “That’s essentially what we’re doing when we expand freeways.” 

https://www.nytimes.com/2023/01/06/us/widen-highways-traffic.html