M4 Junction 8/9: Holyport (A308(M), A330, A404(M))

Map of M4 Junction 8/9: Holyport — M4 Junction 8/9: Holyport. Map data © OpenStreetMap contributors. Map drawing © Corporate Ace Limited.

Junctions 8 and 9 form one interchange at Holyport, where the M4 meets the A404(M) for Maidenhead, Marlow and High Wycombe, and the A308(M) for Maidenhead town centre. Holyport, Bray and Bray Wick are beside it, and Maidenhead station is about a mile and a half north.

Maidenhead and Marlow residents, people commuting out to High Wycombe, and visitors heading for Bray's riverside restaurants all meet the M4 here. Use this page to see the junction and the junctions either side.

Check this junction now: live M4 speed flow map · latest M4 traffic news · M4 serious incidents · M4 accidents

M4 Junction 8/9 Now: Accidents, Incidents and Roadworks

Live traffic news at M4 Junction 8/9

Incidents and roadworks between Junction 7 and Junction 10 that we are aware of.

M4 Eastbound Jct 4B to M25 Clockwise and Anticlockwise Jct 15 exit slip road lane 1 closure

PlannedUpdateAnticlockwise Slip road closed

Time now: Wednesday, 21 October 2026, 21:29 (9:29pm)

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

🚧HA scheduled: 22:00 (10pm) Wed 21 Oct 2026 → 05:30 (5:30am) Thu 22 Oct 2026 starts in about 30 minutes · lasts ~7h 30m

+ 3 more near Junction 8/9 - see all the M4 traffic news →

This is the news for Junction 8/9 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 8/9

The speed strip below shows the M4 around this junction, both directions, from National Highways’ live data, checked every five minutes.

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60 mph +50–5930–4915–29under 15

closedM62connecting motorwayA6A road👈M1our site: tap for its map

services, on the side you can reach them

crashincidentqueueroadworksspeed limitspeed shown on the signsstop-startoverhead sign

reported by drivers, which can’t always be relied onconfirmed by National Highways

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Go to our live M4 traffic speed flow map ›

In an emergency call 999. To report a problem on a motorway, call National Highways on 0300 123 5000 (24 hours).

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 J8/9 in Our Records

Incidents here, last 13 days70 collisions, 7 breakdowns or obstructions

Typical time to clear21 minutesthe middle value of 7 cleared

Slowest daytime hour westbound12:00–13:00average 64 mph (typical 64 mph)

Slowest daytime hour eastbound08:00–09:00average 61 mph (typical 64 mph)

Every incident we recorded at J8/9 in the last 13 days was a breakdown or obstruction rather than a collision. In both directions, traffic usually keeps close to its typical speed through the day.

Average speed by hour of day at J8/9

our average, last 12 daysNational Highways’ typical speed

Westbound

Eastbound

Incidents per week at J8/9

collisionsbreakdowns and obstructions* part week: we started recording during it

The latest 5 here

Tue 20 Oct, 17:24 (5:24pm) Broken Down Vehicle ✓Reported by National Highways
M4 westbound between junctions J8 and J10
✓ Cleared after about 19 minutes
Tue 20 Oct, 14:22 (2:22pm) Broken Down Vehicle ✓Reported by National Highways
M4 eastbound between junctions J10 and J8
✓ Cleared after about 55 minutes
Sun 18 Oct, 10:08 (10:08am) Broken Down Vehicle ✓Reported by National Highways
M4 eastbound between junctions J10 and J8
✓ Cleared after about 5 minutes
Sat 17 Oct, 22:54 (10:54pm) Broken Down Vehicle ✓Reported by National Highways
M4 westbound between junctions J8 and J10
✓ Cleared after about 38 minutes
Wed 14 Oct, 17:38 (5:38pm) Broken Down Vehicle ✓Reported by National Highways
M4 westbound between junctions J8 and J10
✓ Cleared after about 21 minutes

Built from our own records of National Highways’ live data for the M4 either side of J8/9: speeds from 12 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 J8/9, Holyport
Roads at this junction A308(M), A330, A404(M)
Nearest town Maidenhead, 1.7 miles north
Junction before J7, Huntercombe Spur, about 3.0 miles in a straight line
Junction after J10, Winnersh, about 7.3 miles in a straight line

Around M4 Junction 8/9: Holyport: Towns and Places on the Map

Map of the area within about 5 miles of M4 Junction 8/9: Holyport, showing the towns, villages, roads and places to visit — The area within about 5 miles of M4 Junction 8/9. Map data © OpenStreetMap contributors. Map drawing © Corporate Ace Limited.

Places on the Map Near M4 Junction 8/9
Place	What it is	From the junction
Maidenhead	Railway station	About 1.5 miles north
Down Place	Historic house or castle	About 2 miles east
Furze Platt	Railway station	About 2.5 miles north
Taplow	Railway station	About 2.5 miles north-east
Legoland Windsor	Attraction	About 4 miles south-east
BCA Zoo	Attraction	About 4 miles north-west
Westgate Retail Park	Shopping	About 4 miles east
Meryton House	Historic house or castle	About 4.5 miles east