Location: southbound exit slip at junction J4 (High Wycombe) .
Due to: Congestion.
Normal traffic conditions are expected between 17:15 and 17:30 on 26 July 2025.
Nearest town: 1.42m from High Wycombe.

Location: slip road to the M40 southbound from M25 south.
Due to: Congestion.
Normal traffic conditions are expected between 16:15 and 16:30 on 26 July 2025.
Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 2.21m from Uxbridge.

Location: northbound at the junction with the M40 .
Due to: Congestion.
Normal traffic conditions are expected between 16:30 and 16:45 on 26 July 2025.
Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 1.57m from High Wycombe.

Location: southbound exit slip at junction J4 (High Wycombe) .
Due to: Congestion.
Normal traffic conditions are expected between 16:00 and 16:15 on 26 July 2025.
Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 1.5m from High Wycombe.

Location: anticlockwise between junctions J16 (M40) and J15 (Slough) .
Due to: Roadworks scheme.
Period : from 22:01 on 21 July 2025 to 05:00 on 27 July 2025.
Nearest town: 2.61m from Uxbridge.

Location: anticlockwise between junctions J16 (M40) and J15 (Slough) .
Lane Closures : Lane one will be closed.
Due to: Roadworks are planned.
Status : Pending.
Schedule : From 22:30 on 26 July 2025 to 05:00 on 27 July 2025.
Lanes Closed : There will be one of four lanes closed.
Nearest town: 2.61m from Uxbridge.

Location: anticlockwise exit slip at junction J15 (Slough) .
Lane Closures : Lane one will be closed.
Due to: Roadworks are planned.
Status : Pending.
Schedule : From 22:30 on 26 July 2025 to 05:00 on 27 July 2025.
Lanes Closed : There will be one of two lanes closed.
Nearest town: 3.02m from Heathrow.

Location: eastbound entry slip at junction J4B (Heathrow) .
Due to: Roadworks scheme.
Period : from 22:01 on 21 July 2025 to 05:00 on 27 July 2025.
Nearest town: 2.88m from Heathrow.

Location: eastbound entry slip at junction J4B (Heathrow) from the M25 anti-clockwise.
Lane Closures : Lanes 1 and 2 will be closed.
Due to: Roadworks are planned.
Status : Pending.
Schedule : From 22:30 on 26 July 2025 to 05:00 on 27 July 2025.
Lanes Closed : All lanes will be closed.
Nearest town: 2.88m from Heathrow.

Location: northbound exit slip at junction J1A (Watford) .
Lane Closures : Lane two will be closed.
Due to: Roadworks are planned.
Status : Pending.
Schedule : From 23:00 on 1 August 2025 to 05:00 on 2 August 2025.
Lanes Closed : There will be one of two lanes closed.
Nearest town: 1.73m from Uxbridge.

Location: clockwise entry slip at junction J16 (M40) .
Lane Closures : Lanes 1 and 2 will be closed.
Due to: Roadworks are planned.
Status : Pending.
Schedule : From 23:00 on 1 August 2025 to 05:00 on 2 August 2025.
Lanes Closed : All lanes will be closed.
Nearest town: 1.92m from Uxbridge.

Location: anticlockwise between junctions J16 (M40) and J15 (Slough) .
Lane Closures : Lanes 2, 3 and 4 will be closed.
Due to: Roadworks are planned.
Status : Pending.
Schedule : From 23:00 on 1 August 2025 to 06:00 on 2 August 2025.
Schedule : Expect disruption everyday between 22:00 and 05:30 from 4 August 2025 to 6 August 2025.
Lanes Closed : There will be three of four lanes closed.
Nearest town: 2.68m from Uxbridge.

Location: northbound.
Due to: Roadside drains works are planned.
Status : Pending.
Schedule : From 21:30 on 30 July 2025 to 06:00 on 31 July 2025.
Lanes Closed : All lanes will be closed.
Nearest town: 1.65m from High Wycombe.

Location: northbound between the A308 and the junction with the M40 .
Lane Closures : Lane one will be closed.
Due to: Roadside drains works are planned.
Status : Pending.
Schedule : From 21:30 on 30 July 2025 to 06:00 on 31 July 2025.
Lanes Closed : There will be one of two lanes closed.
Nearest town: 0.2m from Marlow.

Location: northbound exit slip to the A4155 .
Due to: Roadside drains works are planned.
Status : Pending.
Schedule : From 21:30 on 30 July 2025 to 06:00 on 31 July 2025.
Lanes Closed : All lanes will be closed.
Nearest town: 0.9m from Marlow.

Location: northbound entry slip from the A4155 .
Due to: Roadside drains works are planned.
Status : Pending.
Schedule : From 21:30 on 30 July 2025 to 06:00 on 31 July 2025.
Lanes Closed : All lanes will be closed.
Nearest town: 1.09m from Marlow.

Location: eastbound entry slip from the M40 .
Due to: Emergency roadworks are planned.
Status : Pending.
Schedule : From 22:00 on 30 July 2025 to 05:30 on 31 July 2025.
Lanes Closed : All lanes will be closed.
Nearest town: 0.89m from Uxbridge.

Location: anticlockwise between junctions J16 (M40) and J15 (Slough) .
Lane Closures : Lanes 1, 2 and 3 will be closed.
Due to: Emergency barrier repairs are planned.
Status : Pending.
Schedule : From 22:30 on 27 July 2025 to 05:00 on 28 July 2025.
Lanes Closed : There will be three of four lanes closed.
Nearest town: 2.04m from Uxbridge.

Location: northbound between junctions J4 (High Wycombe) and J5 (High Wycombe) .
Lane Closures : Lanes 1 and 2 will be closed.
Due to: Roadworks are planned.
Status : Pending.
Schedule : Expect disruption everyday between 20:00 and 06:00 from 29 July 2025 to 2 August 2025.
Schedule : Expect disruption everyday between 20:00 and 06:00 from 4 August 2025 to 8 August 2025.
Lanes Closed : There will be two of three lanes closed.
Nearest town: 1.86m from High Wycombe.

Location: anticlockwise between junctions J16 (M40) and J15 (Slough) .
Lane Closures : Lanes 1 and 2 will be closed.
Due to: Roadworks are planned.
Status : Pending.
Schedule : From 22:00 on 29 July 2025 to 05:00 on 30 July 2025.
Lanes Closed : There will be two of four lanes closed.
Nearest town: 1.92m from Uxbridge.

Location: northbound between junctions J3 (Loudwater) and J4 (High Wycombe) .
Lane Closures : Lane three will be closed.
Due to: Barrier repairs are planned.
Status : Pending.
Schedule : Expect disruption everyday between 21:00 and 06:00 from 29 July 2025 to 2 August 2025.
Schedule : Expect disruption everyday between 21:00 and 06:00 from 4 August 2025 to 9 August 2025.
Schedule : Expect disruption everyday between 21:00 and 06:00 from 11 August 2025 to 16 August 2025.
Schedule : Expect disruption everyday between 21:00 and 06:00 from 18 August 2025 to 22 August 2025.
Lanes Closed : There will be one of three lanes closed.
Nearest town: 2.38m from Beaconsfield.

Location: southbound between junctions J4 (High Wycombe) and J2 (Beaconsfield) .
Lane Closures : Lanes 2 and 3 will be closed.
Due to: Barrier repairs are planned.
Status : Pending.
Schedule : Expect disruption everyday between 21:00 and 06:00 from 29 July 2025 to 2 August 2025.
Schedule : Expect disruption everyday between 21:00 and 06:00 from 4 August 2025 to 9 August 2025.
Schedule : Expect disruption everyday between 21:00 and 06:00 from 11 August 2025 to 16 August 2025.
Schedule : Expect disruption everyday between 21:00 and 06:00 from 18 August 2025 to 22 August 2025.
Lanes Closed : There will be two of four lanes closed.
Nearest town: 2.35m from Beaconsfield.

Location: southbound between junctions J4 (High Wycombe) and J3 (Loudwater) .
Lane Closures : Lanes 2 and 3 will be closed.
Due to: Barrier repairs are planned.
Status : Pending.
Schedule : Expect disruption everyday between 21:00 and 06:00 from 29 July 2025 to 2 August 2025.
Schedule : Expect disruption everyday between 21:00 and 06:00 from 4 August 2025 to 9 August 2025.
Schedule : Expect disruption everyday between 21:00 and 06:00 from 11 August 2025 to 16 August 2025.
Schedule : Expect disruption everyday between 21:00 and 06:00 from 18 August 2025 to 22 August 2025.
Lanes Closed : There will be two of three lanes closed.
Nearest town: 2.49m from High Wycombe.

Location: northbound between junctions J2 (Beaconsfield) and J4 (High Wycombe) .
Lane Closures : Lanes 3 and 4 will be closed.
Due to: Barrier repairs are planned.
Status : Pending.
Schedule : Expect disruption everyday between 21:00 and 06:00 from 29 July 2025 to 2 August 2025.
Schedule : Expect disruption everyday between 21:00 and 06:00 from 4 August 2025 to 9 August 2025.
Schedule : Expect disruption everyday between 21:00 and 06:00 from 11 August 2025 to 16 August 2025.
Schedule : Expect disruption everyday between 21:00 and 06:00 from 18 August 2025 to 22 August 2025.
Lanes Closed : There will be two of four lanes closed.
Nearest town: 2.06m from Beaconsfield.

Location: clockwise between junctions J15 (Slough) and J16 (M40) .
Lane Closures : Lanes 3 and 4 will be closed.
Due to: Roadworks are planned.
Status : Pending.
Schedule : From 22:00 on 28 July 2025 to 05:30 on 29 July 2025.
Schedule : Expect disruption everyday between 22:00 and 05:30 from 30 July 2025 to 1 August 2025.
Lanes Closed : There will be two of four lanes closed.
Nearest town: 2.6m from Uxbridge.

Location: southbound between junctions J5 (High Wycombe) and J4 (High Wycombe) .
Lane Closures : Lanes 1 and 2 will be closed.
Due to: Roadworks are planned.
Status : Pending.
Schedule : Expect disruption everyday between 20:00 and 06:00 from 29 July 2025 to 2 August 2025.
Schedule : Expect disruption everyday between 20:00 and 06:00 from 4 August 2025 to 8 August 2025.
Lanes Closed : There will be two of three lanes closed.
Nearest town: 2.64m from High Wycombe.
