M4 Junction 15 Traffic

🚨 Live at M4 J15 right now

Checked 14:17 · auto-refresh

✅Nothing reported at M4 J15 right now.

Planned closures at M4 J15

🛑 Closed now until 06:00 Sat 5 Dec

M4 westbound Jct 20 exit slip road to M5 northbound Jct 15 - carriageway closed

⇅ Both directionsPart closure

Diversion: Diversion via M5 southbound, exit Jct 16 to turn and return M5 northbound.

🌙 Planned from 21:00 tomorrow until 06:00 Thu 5 Nov

M4 westbound Jct 15 to Jct 16 carriageway closure

← WestboundCarriageway closed

Diversion: Diversion via A419, A4259, A3102.

🌙 Planned from 21:00 tomorrow until 06:00 Thu 5 Nov

M4 westbound Jct 15 entry slip road carriageway closure

← WestboundCarriageway closed

Diversion: Diversion via A419, A4259, A3102.

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

All live M4 traffic →M4 eastbound →M4 westbound →M4 roadworks →

Is M4 junction 15 closed? Quick answers

Checked 14:17 on Tuesday 3 November 2026.

Is M4 junction 15 closed right now?

No. Nothing is closing the road at M4 junction 15 at 14:17.

Is M4 junction 15 closed tonight?

No full closures. M4 junction 15 stays open tonight (Tue 3 Nov, 18:00 to 06:00). 2 lane or slip road closures are planned: westbound Jct 20 exit slip road to M5 northbound Jct 15 - carriageway closed, since Sun 11 Oct 22:00, until Sat 5 Dec 06:00; and westbound Jct 20 exit slip road to M5 northbound Jct 15 - carriageway closed, since Sun 11 Oct 22:00, until Sat 5 Dec 06:00.

Tonight: every M4 closure ›

Is M4 junction 15 closed this weekend?

No full closures. M4 junction 15 stays open this weekend (Fri 6 Nov 18:00 to Mon 9 Nov 06:00). 3 lane or slip road closures are planned: westbound Jct 20 exit slip road to M5 northbound Jct 15 - carriageway closed, since Sun 11 Oct 22:00, until Sat 5 Dec 06:00; and westbound Jct 20 exit slip road to M5 northbound Jct 15 - carriageway closed, since Sun 11 Oct 22:00, until Sat 5 Dec 06:00 and 1 more.

This weekend: every M4 closure ›

Is there an accident at M4 junction 15 today?

No. No collision has been reported at M4 junction 15 since midnight.

M4 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 M4 J15 is

Location from the National Highways junction reference. Nearest towns: Swindon, Marlborough, Royal Wootton Bassett, Cricklade.

📍 Heading to… from M4 J15

Also near this junction

Swindon Designer Outlet Shopping · Swindon, Wiltshire 4 miles north-west in a straight line 🧭 Directions Wiltshire traffic

Avebury Heritage · Avebury, Wiltshire 9 miles south-west in a straight line 🧭 Directions Wiltshire 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 M4 at J15

61Collisions

2Fatal

7Serious

93Casualties

Around the middle

Ranked 297 of 556 UK junctions on record · 23 of 49 on the M4

Wider area: counting every road within 3 miles — local streets, A-roads, everything — 1,034 collisions are on record, 9 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 M4 itself, within 2 miles of J15. 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 M4 J15 → 23 of 49 junctions on the M4 · see where it ranks nationally

❓ M4 J15 — Frequently Asked Questions

Where is M4 junction 15?

M4 J15 is at Swindon & Marlborough. National Highways signs it as Swindon East. The nearest town is Swindon.

Is there an accident at M4 J15?

No — as of 14:17 National Highways list nothing at M4 J15. This page re-checks their live feed every few minutes, 24 hours a day.

Is M4 junction 15 closed?

Partly — M4 westbound Jct 20 exit slip road to M5 northbound Jct 15 - carriageway closed, until 06:00 Sat 5 Dec (as of 14:17).

How many accidents happen at M4 junction 15?

Police STATS19 records show 61 collisions on the M4 within 2 miles of J15, including 2 fatal and 7 serious. Counting every road in the area, 1,034 collisions are recorded within 3 miles. That ranks it 297 of 556 UK junctions we hold collision records for.

What is near M4 junction 15?

Within 15 miles of M4 J15: Swindon Designer Outlet (shopping, Swindon), about 4 miles north-west in a straight line; Avebury (heritage, Avebury), about 9 miles south-west in a straight line.

🚨 Live M4 traffic

Live incidents, roadworks and delays for the whole M4, updated every 5 minutes from National Highways.

🚗 M4 live traffic →

↔️ Next junctions

← J14
Hungerford & Lambourn J16
Swindon & Royal Wootton Bassett →

📍 Towns near this junction

Swindon 3.2 mi Marlborough 7.4 mi Royal Wootton Bassett 7.7 mi Cricklade 9.7 mi

🔢 All M4 junctions

J1 J2 J3 J4 J4A J4B J5 J6 J7 J8 J10 J11 J12 J13 J14 J15 J16 J17 J18 J19 J20 J21 J22 J23 J23A J24 J25 J25A J26 J27 J28 J29 J30 J32 J33 J34 J35 J36 J37 J38 J39 J40 J41 J42 J43 J44 J45 J46 J47 J48 J49

🆘 Broken down near M4 J15?

Car recovery near this junction - local firms you can call direct:

On a motorway? If you can, get onto the hard shoulder or into an emergency area, leave by the left-hand doors and wait behind the barrier. Stuck in a live lane: stay in the car with your seatbelt on and hazard lights on, and call 999.

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