Thorney Interchange trafficM25 Junction 15 · M4 Junction 4B

Closures
11 active road sign messages

Live traffic and incident news for Thorney Interchange. Find out which lanes are closed and when, and keep moving through one of the busiest junctions on the M25.

There are closures in place at Thorney Interchange right now. See the current incidents below for which carriageway, slip road or link road is affected.

Last updated:

Incidents and lane closures now

M4 eastbound between J4B and J4

Lane closed
Lane closures
Started: Expected to end: Source: National Highways

M25 Clockwise Jct 15 lane 3,2 closure between the exit and entry slip road

Other
Started: Expected to end: Source: National Highways

M25 Anti-clockwise Jct 16 to Jct 15 carriageway, exit slip road and link road closure

Closed
Carriageway closures
Started: Expected to end: Source: National Highways

Active road signs

Messages on National Highways electronic signs at or about Thorney Interchange, grouped into one row per unique message.

J16 4 MINS
J21 18 MINS
On 2 signs

Showing since 20:28 · last set 21:05

M25 clockwise (J15, J16)

J4 4 MINS
J3 6 MINS
J1 15 MINS
On 1 sign

Showing since 20:45

M4 eastbound (J4B, J5)

J16 7 MINS
J17 12 MINS
J18 13 MINS
On 1 sign

Showing since 21:06

M25 clockwise (J14, J15)

J5 4 MINS
J6 7 MINS
J8 12 MINS
On 1 sign

Showing since 21:05

M4 westbound (J4, J4B)

J15 5 MINS
J14 6 MINS
On 1 sign

Showing since 21:04

M25 anticlockwise (J15, J16)

J17 7 MINS
J19 11 MINS
J21 15 MINS
On 1 sign

Showing since 21:06

M25 clockwise (J15, J16)

J5 3 MINS
J6 7 MINS
J8 11 MINS
On 1 sign

Showing since 20:16

M4 westbound (J4, J4B)

J17 7 MINS
J19 12 MINS
J21 16 MINS
On 1 sign

Showing since 21:05

M25 clockwise (J15, J16)

J13 5 MINS
J12 8 MINS
On 1 sign

Showing since 20:30

M25 anticlockwise (J15, J16)

J13 6 MINS
J12 9 MINS
On 1 sign

Showing since 19:23

M25 anticlockwise (J15, J16)

TO J13 STAINES
6 MILES
6 MINS
On 1 sign

Showing since 21:01

M25 anticlockwise (J15, J16)

Only messages a sign was set for today are shown. A sign left up from an earlier date may not reflect current conditions and is hidden here — always follow the signs and signals on the road itself.

Planned lane closures and roadworks

Scheduled closures at M25 J15 and M4 J4B over the next 7 days, with the times each one is in place.

M25 Clockwise Jct 15 lane 3,2 closure between the exit and entry slip road

Planned
Other
  • Thu 05 Nov, 22:00Fri 06 Nov, 05:30
  • Fri 06 Nov, 23:00Sat 07 Nov, 06:00

Source: National Highways

M25 Anti-clockwise Jct 16 to Jct 15 carriageway, exit slip road and link road closure

Planned
Carriageway closures
  • Thu 05 Nov, 22:00Fri 06 Nov, 05:30
  • Fri 06 Nov, 23:00Sat 07 Nov, 06:00

Source: National Highways

M25 Anti-Clockwise Jct 16 to Jct 15 Lane 4,3 Closure

Planned
Other
  • Sat 07 Nov, 22:00Sun 08 Nov, 05:30
  • Sun 08 Nov, 22:30Mon 09 Nov, 05:30

Source: National Highways

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

Planned
Other
  • Sat 07 Nov, 22:00Sun 08 Nov, 05:30
  • Sun 08 Nov, 22:30Mon 09 Nov, 05:30

Source: National Highways

M4 Westbound Jct 4B to M25 Clockwise and Anti-clockwise Jct 15 exit slip road lane 2 closure

Planned
Other
  • Sat 07 Nov, 22:00Sun 08 Nov, 05:30
  • Sun 08 Nov, 22:30Mon 09 Nov, 05:30

Source: National Highways

M4 Eastbound Jct 5 to Jct 4B lane 1 closure

Planned
Other
  • Sat 07 Nov, 22:00Sun 08 Nov, 05:30
  • Sun 08 Nov, 22:30Mon 09 Nov, 05:30

Source: National Highways

M25 Clockwise Jct 15 to Jct 16 carriageway closure

Planned
Carriageway closures
  • Sat 07 Nov, 22:00Sun 08 Nov, 05:30
  • Sun 08 Nov, 22:30Mon 09 Nov, 05:30

Source: National Highways

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Keep moving through Thorney Interchange

About Thorney Interchange

Thorney Interchange joins the M25 London Orbital and the M4 west of London, between West Drayton, Iver and Heathrow Airport. It is signed as M25 Junction 15 and M4 Junction 4B, and its free-flowing link roads carry traffic between the two motorways without a roundabout. With Heathrow on one side and the M40 a junction away, the M25 around Thorney is one of the busiest stretches of motorway in the UK.

Junctions either side of Thorney Interchange
Nearby junctionFor
M25 J14A3113 for Heathrow Terminals 4 and 5
M25 J16M40 for Oxford and the A40
M4 J4Heathrow Terminals 2 and 3, Hayes
M4 J5A4 for Colnbrook and Langley

Thorney Interchange FAQs

Is Thorney Interchange closed today?

There are closures in place at Thorney Interchange right now. See the current incidents below for which carriageway, slip road or link road is affected. This page checks National Highways every few minutes.

Where is Thorney Interchange?

Thorney Interchange is where the M25 meets the M4, west of London near West Drayton, Iver and Heathrow Airport. It links M25 Junction 15 with M4 Junction 4B using free-flowing link roads, so traffic can change motorway without stopping at a roundabout.

Which junction numbers make up Thorney Interchange?

Thorney Interchange is M25 Junction 15 and M4 Junction 4B. Road signs, traffic reports and National Highways notices usually refer to it by these junction numbers rather than by name.

When are the lane closures at Thorney Interchange?

Planned lane closures and roadworks are usually scheduled overnight, when traffic is lightest. This page lists every scheduled closure window at Thorney Interchange for the next 7 days, with start and end times, so you can plan around them.

Where does this traffic information come from?

Incidents, lane closures and planned roadworks come from National Highways open data: the Road and Lane Closures feed, travel alerts, and the text shown on electronic motorway signs. Occasionally we add an update by hand when a closure is known but not yet published.