#1 #20 Cartagena, Colombia
One of South America’s most popular tourist destinations, the port city of Cartagena still loses about 117 hours a year to traffic congestion. TomTom data shows evening rush hour is the worst, with congestion averaging 82% and 10km journeys stretching past 40 minutes.
As a port city, traffic is often forced through narrow corridors such as the historic Walled City, wedged between seas and lagoons that clog easily.
To ease pressure on land routes, the city is promoting water-based transportation by modernising waterways such as the Canal del Dique. Noticias Ambientales reports that more than $150 million has been invested to get the project moving.