M1 Junction 6A: Chiswell
Junction 6A is where the M1 meets the M25, at the M25's Junction 21 near Chiswell Green and Bedmond. It is one of the busiest junctions on the road, and an incident on either motorway here can hold up both. There is no exit to local roads. Leavesden Country Park is about two miles south-west and Old Gorhambury House about two miles north.
Long-distance drivers pass through this junction rather than leave at it: hauliers, coach drivers and anyone heading round London on the M25. Before a trip that uses the M25, check this page and the M25's own news.
For live news, roadworks and closures on the orbital motorway itself, see M25 Traffic ↗ (opens in a new tab), our sister site for the M25.
Check this junction now: live M1 speed flow map · latest M1 traffic news · M1 serious incidents · M1 accidents
M1 Junction 6A Now: Accidents, Incidents and Roadworks
Live traffic news at M1 Junction 6A
Incidents and roadworks between Junction 5 and Junction 7 that we are aware of.
M1 northbound Approach to Jct 6 lane 3 and 2 closure
21:50 (9:50pm)21 Oct 2026reported 11 min ago
- Location
- M1 northbound between J5 and J6
- Direction
- Northbound
- Lanes closed
- Lane closures
- Reason
- Roadworks
- Schedule
- 22:00 (10pm) Wed 21 Oct 2026 → 05:00 (5am) Thu 22 Oct 2026
Forecast - not confirmed
+ 1 more near Junction 6A - see all the M1 traffic news →
This is the news for Junction 6A only, not the whole M1. For the rest of the motorway see all the latest M1 traffic news, the overhead signs and the speed limits in force now.
Updated 22:02 (10:02pm) Wed 21 Oct 2026
Live Traffic Speeds at M1 Junction 6A
The speed strip below shows the M1 around this junction, both directions, from National Highways’ live data, checked every five minutes.
Untick all three to see just the speeds. We show the important overhead signs and the mandatory speed limits (red ring); see every overhead sign.
Go to our live M1 traffic speed flow map ›
NOTE: The speed flow, overhead sign messages or other information shown on our live traffic speed flow map is updated every few minutes. We cross check the data and aim to provide warnings if there could be a delay or an inaccurate speed reading. There can be occasions, beyond our control, and despite our best efforts where the speed flow could be inaccurate. We cannot therefore guarantee the speed you can expect on any stretch of the motorway is always accurately shown. However we hope you will find our live traffic speed flow map a useful tool in trying to plan your journey. Safe driving.
All the latest M1 traffic news →Live M1 traffic speed flow map →
M1 J6A in Our Records
No accidents, breakdowns or obstructions at J6A have reached us in the last 13 days. Northbound, the slowest daytime hour is 17:00, about 15 mph below the typical speed. Southbound, the slowest daytime hour is 14:00, about 7 mph below the typical speed.
Average speed by hour of day at J6A
Northbound
Southbound
Incidents per week at J6A
Built from our own records of National Highways’ live data for the M1 either side of J6A: speeds from 13 days of five-minute readings, incidents from the last 13 days (we started recording incidents on 09/10/2026). Each incident is counted once. Updated every five minutes.
- Junction M1 J6A, Chiswell
- Nearest town Kings Langley, 2.8 miles west
- Junction before J6, Waterdale, about 1.5 miles in a straight line
- Junction after J8, Breakspears, about 1.5 miles in a straight line
Around M1 Junction 6A: Chiswell: Towns and Places on the Map
| Place | What it is | From the junction |
|---|---|---|
| Leavesden Country Park (South Side) | Park or nature reserve | About 2 miles south-west |
| Woodside Stadium | Venue | About 2 miles south |
| Old Gorhambury House | Historic house or castle | About 2 miles north |
| The Hypocaust | Attraction | About 2 miles north-east |
| Hanstead House | Historic house or castle | About 2.5 miles south-east |
| Garston | Railway station | About 2.5 miles south |
| Munden House | Historic house or castle | About 3 miles south-east |
| St Albans City Hospital | Hospital | About 3 miles north-east |
