London has the slowest-moving traffic in Europe, according to a study released yesterday which put six British cities in the Top Ten.

Traffic in London moves at an average of 12mph. By contrast, cars get through Hamburg, the fastest-moving city surveyed, at more than 50mph.

Other British cities in the Top Ten are Manchester, at 17mph; Edinburgh, at 18mph; Glasgow, at 19mph; and Bristol and Belfast, both at about 20mph. Newcastle-upon-Tyne was the fastest-moving city in the country, with an average of 26mph.
http://driving.timesonline.co.uk/tol/life_and_style/driving/article2674963.ece