Six UK cities are among the 10 most congested, with London topping the survey as the slowest.
Cars travel at an average of just 11.8mph in Britain's capital, whereas cyclists average 14mph in the rush hour.
The best result for a UK city monitored was achieved by Newcastle-upon-Tyne, where traffic moved at an average of 26.1mph.
The information was compiled by Keepmoving.co.uk, which used satellite tracking to check the speed of vehicles in 30 major European cities.
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