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'Spend £800m on public transport' to cut M4 queues

Two in hospital after five-vehicle crash shut M4

M4 reopens following diesel spill after crash

Prince of Wales Bridge reopens after crash

UK ministers 'could bypass Welsh Government' on M4

'UK government would build M4 relief road' Video, 00:01:30'UK government would build M4 relief road'

Man arrested following fatal motorway crash

Two killed in overnight M4 crashes

Motorcyclist died 'doing something he loved'

Motorcyclist, 70, killed in M4 crash

M4 to close near Slough for bridge demolition

Rice fell off lorry closing 'slippery' motorway

Roadchef shares scandal widow demands action

M4 junction roadworks to tackle congestion begin

Five hurt and long delays as crash closes M4

'Hoarder' hit on M4 while 'looking in stray box'

Motorway roadworks speed limit to be raised

Million spent on M4 road homes weeks before axe

Man arrested over fatal M4 crash

'Motorway charge may be necessary' Video, 00:02:29'Motorway charge may be necessary'

Prime minister has 'no say' on the M4 relief road

PM: 'We will unblock the Brynglas tunnels' Video, 00:01:08PM: 'We will unblock the Brynglas tunnels'

Teenagers fired catapults at vehicles on M4