London has the slowest rush-hour traffic, with the average car commuter travelling 14km/h in peak hour and losing 325 hours a year – the equivalent of almost 41 working days, according to data from TomTom, the navigation technology company which collects data in 390 cities.

In South Africa, Pretoria is the most congested with commuters losing the equivalent of 18 working days to sitting in traffic. In Cape Town, drivers spend 16.5 working days in traffic, while Joburgers lose 15 working days, moving at an average speed of 37km/h. Durbanites positively speed along at 41km/h.

Travel time is affected by the number of cars, the road infrastructure, speed limits and traffic management, such as out-of-order traffic lights.