M4 Junction 6: Tuns Lane (A332, A355)
Junction 6 is the main turn for Slough, under a mile north, and Windsor and Eton to the south, on the A355 and the A332. Chalvey, Eton Wick and Eton are close by. Slough Retail Park is under a mile north, and Slough Museum about a mile north.
Families on a day out at Legoland, visitors to Windsor Castle, Slough commuters and sales reps calling on the town's business parks all come through Junction 6. This page gives you the junction, what is near it, and how it has been running.
Legoland Windsor, about four miles south-west, opened in 1996 on the site of the old Windsor Safari Park and covers about 150 acres. Tickets and opening days are on the Legoland Windsor website ↗ (opens in a new tab).
Check this junction now: live M4 speed flow map · latest M4 traffic news · M4 serious incidents · M4 accidents
M4 Junction 6 Now: Accidents, Incidents and Roadworks
Live traffic news at M4 Junction 6
Incidents and roadworks between Junction 5 and Junction 7 that we are aware of.
M4 Eastbound Jct 4B to M25 Clockwise and Anticlockwise Jct 15 exit slip road lane 1 closure
21:28 (9:28pm)21 Oct 2026reported just now
- Location
- link road from M4 J4B eastbound to M25 J15
- Direction
- Anticlockwise
- Lanes closed
- Slip road closed
- Reason
- Repair work
- Schedule
- 22:00 (10pm) Wed 21 Oct 2026 → 05:30 (5:30am) Thu 22 Oct 2026
Forecast - not confirmed
+ 2 more near Junction 6 - see all the M4 traffic news →
This is the news for Junction 6 only, not the whole M4. For the rest of the motorway see all the latest M4 traffic news, the overhead signs and the speed limits in force now.
Updated 21:29 (9:29pm) Wed 21 Oct 2026
Live Traffic Speeds at M4 Junction 6
The speed strip below shows the M4 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 M4 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 M4 traffic news →Live M4 traffic speed flow map →
M4 J6 in Our Records
Every incident we recorded at J6 in the last 13 days was a breakdown or obstruction rather than a collision. Westbound, traffic usually keeps close to its typical speed through the day; the slowest hour is 11:00. Eastbound, the slowest daytime hour is 07:00, about 6 mph below the typical speed.
Average speed by hour of day at J6
Westbound
Eastbound
Incidents per week at J6
The latest 4 here
- Tue 20 Oct, 15:37 (3:37pm) Broken Down Vehicle ✓Reported by National Highways
M4 eastbound between junctions J6 and J5
✓ Cleared after about 28 minutes - Tue 20 Oct, 15:00 (3pm) Broken Down Vehicle ✓Reported by National Highways
M4 westbound between junctions J5 and J6
✓ Cleared after about 4 minutes - Sun 18 Oct, 11:32 (11:32am) Broken Down Vehicle ✓Reported by National Highways
M4 eastbound exit slip at junction J6
✓ Cleared after about 87 minutes (1.45 hours) - Wed 14 Oct, 09:02 (9:02am) Broken Down Vehicle ✓Reported by National Highways
M4 eastbound between junctions J6 and J5
✓ Cleared after about 17 minutes
Built from our own records of National Highways’ live data for the M4 either side of J6: 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 M4 J6, Tuns Lane
- Roads at this junction A332, A355
- Nearest town Eton, 1.1 miles south
- Junction before J5, Langley Roundabout, about 3.3 miles in a straight line
- Junction after J7, Huntercombe Spur, about 1.8 miles in a straight line
Around M4 Junction 6: Tuns Lane: Towns and Places on the Map
| Place | What it is | From the junction |
|---|---|---|
| Slough Retail Park | Shopping | Under a mile north |
| Slough Museum | Attraction | About 1 mile north |
| Arbour Park | Venue | About 1.5 miles north-east |
| Meryton House | Historic house or castle | About 2 miles south |
| Stag Meadow | Venue | About 2.5 miles south |
| Ditton Park Manor | Historic house or castle | About 2.5 miles east |
| Down Place | Historic house or castle | About 2.5 miles west |
| Deep Sea Adventure | Attraction | About 3 miles south-west |
