M40 Junction 3 Traffic

🚨 Live at M40 J3 right now

Checked 13:56 · auto-refresh

✅Nothing reported at M40 J3 right now.

Planned closures at M40 J3

🌙 Planned from 22:15 until 06:00 Wed 4 Nov

M40 Southbound, Jct 4 to Jct 3 carriageway closure

↓ SouthboundCarriageway closed

Diversion: diversion route for maintenance work Diversion via National Highways network and local authority road

🌙 Planned from 22:15 until 06:00 Wed 4 Nov

M40 northbound, Jct 3 exit slip road closure

↑ NorthboundPart closure

Diversion: diversion route for maintenance works. Diversion via National Highways network and local authority roads.

Straight from National Highways, re-checked every 3 minutes while this page is open.

All live M40 traffic →M40 northbound →M40 southbound →M40 roadworks →

Is M40 junction 3 closed? Quick answers

Checked 13:56 on Tuesday 3 November 2026.

Is M40 junction 3 closed right now?

No. Nothing is closing the road at M40 junction 3 at 13:56.

Is M40 junction 3 closed tonight?

Yes. M40 junction 3 has 1 full closure planned tonight (Tue 3 Nov, 18:00 to 06:00): Southbound, Jct 4 to Jct 3 carriageway closure, 22:15 to 06:00. Plus 1 lane or slip road closure. Diversion: diversion route for maintenance work Diversion via National Highways network and local authority road.

Tonight: every M40 closure ›

Is M40 junction 3 closed this weekend?

No. No closures are planned at M40 junction 3 this weekend (Fri 6 Nov 18:00 to Mon 9 Nov 06:00).

This weekend: every M40 closure ›

Is there an accident at M40 junction 3 today?

No. No collision has been reported at M40 junction 3 since midnight.

M40 accidents today and yesterday ›

Answers use official data only: the National Highways live incident feed and their planned closure report. A closure is counted here when National Highways name this junction or a stretch that runs through it.

🗺️ Where M40 J3 is

Location from the National Highways junction reference. Nearest towns: High Wycombe, Beaconsfield, Marlow, Maidenhead.

📍 Heading to… from M40 J3

Also near this junction

Cliveden Heritage · Taplow, Buckinghamshire 3 miles south in a straight line 🧭 Directions Buckinghamshire traffic

Windsor Castle Heritage · Windsor, Berkshire 9 miles south-east in a straight line 🧭 Directions Berkshire traffic

LEGOLAND Windsor Resort Theme park · Windsor, Berkshire 9.5 miles south in a straight line 🧭 Directions Berkshire traffic

Ascot Racecourse Racecourse · Ascot, Berkshire 13 miles south in a straight line 🧭 Directions Berkshire traffic

Heathrow Airport Airport · Heathrow, Greater London 14 miles south-east in a straight line 🧭 Directions Greater London traffic

Vicarage Road Stadium · Watford, Hertfordshire 14 miles east in a straight line 🧭 Directions Hertfordshire traffic

Places and the junctions they are reached from are kept by our team; distances are measured in a straight line from the junction, not along the road.

⚠️ Collision record on the M40 at J3

81Collisions

6Fatal

19Serious

133Casualties

Far worse than most

Ranked 34 of 556 UK junctions on record · 1 of 15 on the M40

Wider area: counting every road within 3 miles — local streets, A-roads, everything — 1,180 collisions are on record, 20 of them fatal. That figure follows how built-up the area is, so it is shown for context and is not what the ranking uses.

Department for Transport STATS19 police collision records on the M40 itself, within 2 miles of J3. This is the free summary — the full breakdown by severity, weather, road surface, time of day and individual record is in the blackspot report.

📊 Full collision analysis for M40 J3 → 1 of 15 junctions on the M40 · see where it ranks nationally

❓ M40 J3 — Frequently Asked Questions

Where is M40 junction 3?

M40 J3 is at High Wycombe & Loudwater. National Highways signs it as Loudwater. The nearest town is High Wycombe.

Is there an accident at M40 J3?

No — as of 13:56 National Highways list nothing at M40 J3. This page re-checks their live feed every few minutes, 24 hours a day.

Is M40 junction 3 closed?

Not right now. Planned: M40 Southbound, Jct 4 to Jct 3 carriageway closure, from 22:15 until 06:00 Wed 4 Nov.

How many accidents happen at M40 junction 3?

Police STATS19 records show 81 collisions on the M40 within 2 miles of J3, including 6 fatal and 19 serious. Counting every road in the area, 1,180 collisions are recorded within 3 miles. That ranks it 34 of 556 UK junctions we hold collision records for.

What is near M40 junction 3?

Within 15 miles of M40 J3: Cliveden (heritage, Taplow), about 3 miles south in a straight line; Windsor Castle (heritage, Windsor), about 9 miles south-east in a straight line; LEGOLAND Windsor Resort (theme park, Windsor), about 9.5 miles south in a straight line; Ascot Racecourse (racecourse, Ascot), about 13 miles south in a straight line; Heathrow Airport (airport, Heathrow), about 14 miles south-east in a straight line; Vicarage Road (stadium, Watford), about 14 miles east in a straight line.

🚨 Live M40 traffic

Live incidents, roadworks and delays for the whole M40, updated every 5 minutes from National Highways.

🚗 M40 live traffic →

↔️ Next junctions

← J2
Beaconsfield & Penn J4
High Wycombe & Marlow →

📍 Towns near this junction

High Wycombe 2.7 mi Beaconsfield 3.2 mi Marlow 3.2 mi Maidenhead 5.1 mi

🔢 All M40 junctions

J1 J1A J2 J3 J4 J5 J6 J7 J8 J9 J10 J11 J12 J13 J14 J15 J16

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