Map of M4 Motorway Junctions

Map of the M4 motorway junctions.

West M4

To the West the M4 joins the M5 at M4 Junction 20 which heads north to Devon Cornwall and the South West of England.

The Western end of the M4 is in South Wales Junctions 23 to 48. Bridgend is on Junctions 25 to 37, M4 Junctions 44 and 45 for Swansea, Junctions 30 to 33 for Cardiff and Junctions 24 to 28 for Newport.

East M4

At the eastern end of the M4 is London, with Junctions for Slough, Reading, Newbury, Swindon and Bristol on the way to Wales in the West.

How Do I Find M4 Traffic News?

Simply type the search words in the search facility towards the top right of this page and click "search".

M4 westbound between J16 and J17 | Westbound | Roadworks
Fri, 23 Jan 2015 18:11:47 GMT
M4 Roadworks
On the M4 westbound between junctions J16 and J17, there are currently delays of 10 mins due to roadworks . Expect disruption until 9:00 pm on 14 March 2015.

M4 westbound between J17 and J18 | Westbound | Roadworks
Tue, 20 Jan 2015 14:27:11 GMT
M4 Roadworks
On the M4 westbound between junctions J17 and J18, there are currently delays of 10 mins due to roadworks . Expect disruption until 6:00 am on 17 April 2015.

M4 eastbound between J18 and J17 | Eastbound | Roadworks
Tue, 20 Jan 2015 14:25:38 GMT
M4 Roadworks
On the M4 eastbound between junctions J18 and J17, there are currently delays of 10 mins due to roadworks . Expect disruption until 6:00 am on 17 April 2015.

M4 J19 westbound access | Westbound | Roadworks
Fri, 27 Feb 2015 20:57:27 GMT
M4 Roadworks
The M4 westbound entry slip at junction J19 is closed , due to roadworks. Road expected to re-open from 6:00 am on 28 February 2015.

M4 eastbound between J10 and J8 | Eastbound | Roadworks
Fri, 27 Feb 2015 22:21:52 GMT
M4 Roadworks
On the M4 eastbound between junctions J10 and J8, there are currently delays of 10 mins due to roadworks closing two lanes. Expect disruption until 6:00 am on 28 February 2015.

Map of M4 Motorway Junctions

West M4

East M4

How Do I Find M4 Traffic News?

Latest M4 News