Urban planners know adding streets won’t make traffic any better, indeed adding capacity for more cars does the opposite: it makes traffic worse. The problem is that the average person (and politicians) don’t know this little quirk of urban planning. As a result we still build sub-urban areas to cater to old notions of traffic design instead of letting urban planners implement smarter, better solutions.
So what’s a solution to bad traffic? Road diets.
Today, we now know that bigger roads and extra traffic lanes do nothing to solve congestion. In fact, it tends to induce even more traffic. So we didn’t fix the congestion issues, and on top of that, we built wide roads that are relatively unsafe.
Transportation planners in the 21st century recognized that many of the roads that were overbuilt could be redesigned to calm speeding and add space for newer multimodal transportation options. And thus, the road diet was born.