2024 U.S. Transportation Climate Impact Index: How metros rank across 8 key factors – “With transportation still representing the top source of greenhouse gas (GHG) emissions in the U.S., new federal funding and regulations hope to spur climate-friendly infrastructure. Meanwhile, agencies across the nation are working to drive down Vehicle Miles Traveled (VMT), boost walking and biking, and speed EV adoption. Between all these factors, how is your metro faring at building a climate-friendly transportation system? Download our 2024 U.S. Transportation Climate Impact Index to learn: