Worst rush hour traffic (city)

The city in the world with the worst traffic congestion during rush hour, by comparison to normal free-flowing conditions, is Dublin, Ireland, where in 2023 it took an average of 66% more time to travel during peak hours. This means that a driver taking a two-way 10 km trip every weekday rush would spend extra 158 hours in their car compared with someone who made the same trip at a different time.

This data is provided by the TomTom Traffic Index, which uses floating car data (FCD) from various sources across 387 cities in 55 countries and six continents, and which takes into account a) quasi-static factors (e.g., road infrastructure, such as street categories, capacities, and speed limits) and b) dynamic factors (e.g., traffic congestion and changes in flow).