Widening highways doesn’t help with traffic congestion, but affects climate change

Highway expansions emit a lot of carbon in their production.

California prides itself on its climate leadership. And the state’s work on transportation—its largest source of emissions—is no exception; its electric vehicle policies have been adopted by other states across the country. Sacramento lawmakers have also taken ambitious steps to reduce car use altogether, developing regulations aimed at reshaping communities to encourage walking, biking, and taking public transportation.