M4 London–Bristol: how busy it usually is
M4 London–Bristol is one of the eight commuter corridors UK Live Traffic watches. The Department for Transport counts traffic at 42 points on it; spread over the week with DfT's national hourly pattern, that says how busy it usually is at any hour.
Usual is not live. The live map adds the current disruptions and traffic cameras along the corridor, the buses on it and, with a Darwin key, the trains on the railway beside it: Explore, then Corridors.
Open M4 London–Bristol on the live map
- Roads
- M4
- Count points
- 42
- Parallel railway
- PAD to BRI
How many of the corridor's count points are usually busy or worse
| When | Busy or worse | Share |
|---|---|---|
| Weekdays 03:00 | 0 of 42 | 0% |
| Weekdays 08:00 | 38 of 42 | 90% |
| Weekdays 12:00 | 19 of 42 | 45% |
| Weekdays 17:00 | 40 of 42 | 95% |
| Weekdays 21:00 | 0 of 42 | 0% |
| Saturday 12:00 | 40 of 42 | 95% |
| Sunday 12:00 | 32 of 42 | 76% |
Typical for the hour of the week, from traffic counts: not live. The live map has what is happening now.
The busiest count points at the weekday morning peak (08:00)
| Road | Between | Vehicles a day | Usually at 08:00 |
|---|---|---|---|
| M4 | LA Boundary to 11 | 86,029 | Very busy |
| M4 | LA Boundary to 22 | 84,037 | Very busy |
| M4 | 17 to 16 | 82,987 | Very busy |
| M4 | LA Boundary to 15 | 82,860 | Very busy |
| M4 | 16 to LA Boundary | 82,860 | Very busy |
Typical for the hour of the week, from traffic counts: not live. The live map has what is happening now.
More motorway corridors
Where the figures come from
- Road traffic: Department for Transport road traffic counts (Open Government Licence v3.0), spread over the week with DfT's national hourly pattern.