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Main road in Swansea re-opens after crash

Six-vehicle crash leads to nine-mile M4 queues

M4 delays after car catches fire

Bank holiday travellers warned of delays

Goose chase shuts the M4. Video, 00:00:55Goose chase shuts the M4

Crash causes M4 delays as rain batters Wales

Overturned lorry causes serious congestion

Mark Drakeford 'prepared to spend £1bn on M4'

M4 motorists experience delays of over an hour

Shutting M4 junctions 'would increase city queues'

Motorway cut to 50mph to reduce pollution

'Walkway' rail station plan for Magor

The M4 and us: What about the future?

How the M4 defined 'halfway town'

1976: Rocky road building the M4 in Wales. Video, 00:00:571976: Rocky road building the M4 in Wales

First M4 bilingual signs in 1977. Video, 00:00:46First M4 bilingual signs in 1977

Commuter's 'love-hate' M4 relationship. Video, 00:01:41Commuter's 'love-hate' M4 relationship

How traffic is set to rise on the M4

M4 congestion beyond Newport

Electric cars could drive green future

Man seriously injured in M4 crash

£114m spent on axed M4 road project

Five things the M4 planning inspector said