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The M4 has 50 speed cameras on the map. The most are in Newport, with 19. 43 of its 50 cameras have a posted limit on the map, most often 50 mph. One average speed section is mapped on it. The counts are from the map, as of 26 October 2026.
M4 speed camera map
Each bright dot is a camera on the M4. Faint dots are other cameras close by. Open the full map to zoom in on a stretch of the road.
Cameras on the M4 by kind
50 cameras on the M4 are on the map in all. Average speed cameras are speed cameras too, so the speed total holds them.
- Speed cameras at one spot 50
Where the cameras on the M4 are
The M4 runs through 9 local authority areas that have cameras on the road. Each row counts the cameras on the road in that area.
By region: South East 18, London 9 and South West 2.
Posted limits on the M4
43 of the 50 cameras on the M4 have a posted limit on the map. The table counts them by limit.
| Posted limit | Cameras |
|---|---|
| 40 mph | 3 |
| 50 mph | 22 |
| 60 mph | 4 |
| 70 mph | 14 |
Average speed cameras on the M4
One average speed section is mapped on the M4. It is 0.7 miles long.
| Section in | Miles | Posted limit |
|---|---|---|
| Hounslow | 0.7 | 40 mph |
When the M4 cameras were mapped
14 of the 50 cameras carry the day they were first added to the map. The earliest is from 7 May 2011, the latest from 22 July 2025.
More roads and places
Other roads with pages of their own that run through the same regions, most speed cameras first.
Sources and updates
- OpenStreetMap contributors: speed, average speed, red light and other enforcement cameras, and the motorways and A roads they sit on, data as of 26 October 2026; ODbL 1.0
- Transport for London (London Safety Camera Partnership): London's speed and red light camera sites, read 7 November 2026. Powered by TfL Open Data. Contains OS data © Crown copyright and database rights 2016 and Geomni UK Map data © and database rights [2019]; TfL Transport Data Service licence (Open Government Licence v2.0 with TfL amendments)
- Office for National Statistics: Local Authority Districts (May 2026) Boundaries UK BGC (generalised 20 m, clipped to the coastline), and the English regions, which place each camera. Source: Office for National Statistics licensed under the Open Government Licence v.3.0. Contains OS data © Crown copyright and database right 2026.
- Natural Earth: the UK outline on the map, 1:50m (public domain)
Cite this page: “M4 Speed Cameras: 50 Mapped, by Area and Limit (UK)”, CamsAhead.com, https://camsahead.com/uk/roads/m4/, updated 7 November 2026.
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