These US cities have the worst congestion

Traffic is increasing in cities worldwide, but some have it worse than others.

INRIX, a traffic data firm based in Washington, ranked the 25 US cities with the worst congestion based on the duration, length, and frequency of traffic jams in the city. As part of the ranking, INRIX determined the number of traffic "hot spots" in each city.

INRIX then identified the cost of congestion to each city by evaluating what the overall economic cost to drivers would be if nothing were to change by 2026. That cost was determined based on wasted time, fuel, and emissions.

Scroll down for a closer look at the 25 cities with the worst congestion: