You may think your daily commute might be bad, but drivers in Brussels face the worst traffic jams in the world according to the annual Traffic Scorecard compiled by traffic and navigation service provider INRIX in Kirkland, Wash.

FORBES: The World's Most Traffic-Congested Cities

Business leaders say traffic jams, particularly after crashes which close the motorway, are bad for the economy of south Wales.

BBC: M4 relief road: Chancellor 'to approve toll plan'