Trump's transportation pick could bring a U-turn

• "He will prioritize Excellence, Competence, Competitiveness and Beauty when rebuilding America's highways, tunnels, bridges and airports," Monday night's announcement states.

Why it matters: The agency controls billions of dollars in funding, and transportation is the country's largest source of CO2 emissions.

What they're saying: "I suspect he'll provide substantially fewer competitive grant funds to projects that support low-carbon transportation, like transit, pedestrian improvements, and bike ways," Urban Institute transit expert Yonah Freemark told Axios via email.

• The League of Conservation Voters noted that his 2% score from the group was the lowest of any prospective nominee so far.

The other side: Duffy will bring a "Golden Age of Travel, focusing on Safety, Efficiency, and Innovation," the transition team announcement states.

What we're watching: The fate of Biden-era various initiatives under the 2021 infrastructure law and IRA that have unused funds, like the Low Carbon Transportation Materials Program.

• DOT also crafts vehicle mileage rules.
• They work in tandem with EPA CO2 regs that Trump officials call an ill-conceived thumb on the scale for EVs.