WASHINGTON – There’s a new study of traffic congestion in D.C. and around the world. It was done by traffic analysis company called INRIX. The latest traffic report card looked at traffic issues in more than 900 cities around the globe. INRIX said three of the most congested cities on Earth are in the United States, but D.C. is not one of them. Instead, New York, Chicago and Los Angeles topped the list in 2024.