Interesting read. Found this particularly interesting:

Within a year of the rule’s adoption in 2021, Colorado’s Department of Transportation, or CDOT, had canceled two major highway expansions, including Interstate 25, and shifted $100 million to transit projects. In 2022, a regional planning body in Denver reallocated $900 million from highway expansions to so-called multimodal projects, including faster buses and better bike lanes.

Now, other states are following Colorado’s lead. Last year, Minnesota passed a $7.8 billion transportation spending package with provisions modeled on Colorado’s greenhouse gas rule. Any project that added road capacity would have to demonstrate how it contributed to statewide greenhouse gas reduction targets. Maryland is considering similar legislation, as is New York.

“We’re now hoping that there’s some kind of domino effect,” said Ben Holland, a manager at RMI, a national sustainability nonprofit. “We really regard the Colorado rule as the gold standard for how states should address transportation climate strategy.”