(31 March 2015) – This year’s TomTom Traffic Index, which contains the congestion level of 218 cities on 6 continents in 2014, reveals that the evening rush hour is the most congested time of day on virtually every road network around the world.
The TomTom Traffic Index is aiming to provide the general public, industry and policy makers with unique and unbiased information about congestion levels in urban areas.
Based on GPS data, the methodology that is used on this website measures travel times during the whole day and during peak periods and compares these with measured travel times during non-congested periods (free flow conditions). The difference is expressed as a total average percentage increase in travel time.
Istanbul (TR) is the world’s most congested city. Łódź (PL), Palermo (I), Bucharest (RO), Warsaw (PL), Belfast (UK), Rome (I), Dublin (IRL), London (UK), Marseille (F) and Edinburgh (UK) are the ten most congested cites in the EU.