M4 motorway

Drivers' 20mph reminder in Wales this Christmas

Motorway reopens after early morning diesel spill

Cracked bridge over motorway to be demolished

Fatal crash closes stretch of motorway

Man dies in serious collision between car and lorry

M4 pollution charge powers for ministers approved

Proposal submitted for 24-hour M4 service station

Loaded car transporter leaves M4 and overturns

Driver caught speeding at 103 mph on M4

M4 reopens after overturned van cleared

Man found lying on M4 motorway seriously injured

New baby helps couple after children died in crash. Video, 00:01:00New baby helps couple after children died in crash

Mum's new baby joy after children's crash deaths

Moments after M4 double death crash captured. Video, 00:00:58Moments after M4 double death crash captured

Transport secretary visits £460m road scheme

'Loving' mother and daughter killed in crash named

Motorway reopens following fatal crash

Two women die following multi-vehicle crash

Motorway lane reopens after coach and lorry crash

Car overturns and catches fire in motorway crash

Motorway reopens after lorry overturns

Man charged with drink driving following crash

Emergency services called to coach fire on motorway