Revealed: Dublin ranked worse than London or Paris for road congestion
Belfast and Dublin have been ranked the sixth and seventh most congested cities in Europe respectively.
The annual congestion index from satnav maker TomTom claimed both cities were worse than Paris, London and Rome, with Belfast the most congested UK city. Dublin is the 15th most congested city in the world, according to the gauge.
The traffic index claimed that drivers in Dublin spend 40pc extra travel time per journey on average, compared to what it would take on traffic-free streets. That's slightly worse than the previous index - and can rise to 85pc extra in the morning peak.
The data from TomTom devices installed in vehicles showed that the most congested day last year was Wednesday, November 18. Business chiefs have already warned that rising congestion in the capital is posing a problem.
In the top spot is Mexico City. Next in the rankings are Bangkok (57pc), Istanbul (50pc), Rio de Janeiro (47pc), and Moscow (44pc), making up the top five most congested cities in the world.
Using data from 2015, the TomTom Traffic Index looks at the traffic congestion situation in 295 cities in 38 countries on six continents - from Rome to Rio, Singapore to San Francisco.
TomTom said traffic congestion is up by 13pc globally since 2008.
Ralf-Peter Schaefer, the vice-president of TomTom Traffic, said the index is released every year to help drivers, cities and transport planners to understand traffic congestion trends.