A303 roadworks

Find the latest traffic disruptions for A303, A34 and M3 here

The following list of roadworks and disruptions to A303, A34, M3, M4 and A308 is correct as of Monday 15th July to 21st July and may be subject to change due to weather conditions, stay updated on our traffic news section.

A303 Popham to Bullington Cross, Hampshire: road markings

Work to improve journeys by renewing the road markings along the A303 continues this week. The westbound carriageway from the M3 (Popham) to the A34 (Bullington Cross) will be closed overnight, between 9pm and 6am, from Thursday 18 July for 2 nights. A signed diversion will be in place via the M3 and A34 for motorway permitted vehicles; or via the A33 and A34 for non-motorway vehicles.

A303 Andover, Hampshire to Tidworth, Wiltshire: road markings

Work to improve journeys by renewing the road markings along the A303 continues this week. The westbound carriageway from the A342 Hundred Acre junction to the A338 Parkhouse Cross junction will be closed overnight, between 9pm and 6am, from Monday 15 July for 3 nights. A signed diversion will be in place via the A342, Ludgershall, Tidworth and the A338.

A34 Highclere, Hampshire: drainage

Work to ensure road user safety by maintaining the drainage system along the A34 near Beacon Hill takes place this week. The northbound exit slip road will be closed overnight, between 9pm and 6am, from Monday 15 July for 6 nights (Monday to Friday only). A signed diversion will be in place via Tot Hill junction and return.

A34 Speen to Chieveley (Newbury), West Berkshire: road markings

Work to improve journeys by renewing the road markings along the A34 continues this week. The A34 northbound carriageway will be closed from the A4 Speen junction to Chieveley overnight, between 9pm and 6am, from Monday 15 July for 3 nights. A signed diversion will be in place via Newbury.

A34 Oxford to Wendlebury, Oxfordshire: road markings

Work to improve journeys by renewing the road markings along the A34 continues this week. The A34 northbound carriageway will be closed from the A44 Peartree Interchange to the M40 overnight, between 9pm and 6am, on Monday 15 July. A signed diversion will be in place via Oxford, the A40 and the M40 for motorway permitted vehicles; and via the A44, Enslow, Kirtlington and Bicester for non-motorway vehicles.

A308(M) Maidenhead, Berkshire: safety barrier

Work to ensure road user safety by replacing the safety barrier along the central reservation of the A308(M) continues this week. Narrow lanes and a 40mph speed limit are in place on both carriageways until Thursday 18 July.

The A308(M) north and southbound carriageways will be closed overnight, between 9pm and 6am, on Wednesday 17 July. A signed diversion will be in place via the A308, A4 and A404(M).

M4 junctions 8/9 at Maidenhead to 11 at Reading, Berkshire: upgrade to smart motorway

Work to improve journeys by converting the M4 into a smart motorway between Junctions 3 at Hayes to Junction 12 at Theale continues this week. 24-hour narrow lanes and a 50mph speed restriction are in place for sections of this stretch of the M4. Carriageway and slip road closures are planned as follows, all fully closed overnight between approximately 10pm and 5am (traffic management will usually be rolled out from 9pm and taken off by 6am).

Full closures booked for the week commencing Monday 15th July are as follows:

  • The M4 westbound carriageway between junctions 8/9 (Maidenhead) and 10 (Wokingham) will be closed overnight on Monday 15th, Tuesday 16th and Wednesday 17th July. Clearly signed diversions will be in place utilising the A404M, A4, A3290 and A329M.
  • The M4 eastbound carriageway between junctions 10 (Wokingham) and 8/9 (Maidenhead) will be closed overnight on Thursday 18th and Friday 19th July. Clearly signed diversions will be in place utilising the A329M, A3290, A4 and A404M.

There are also slip road closures booked as follows:

  • Junction 11 – the eastbound exit slip will be closed overnight on 15th, 16th, 17th and 18th July. A contingency booking is in place for 19th July.
  • Junction 11 – the eastbound entry slip will also be closed overnight on 15th, 16th, 17th and 18th July. A contingency booking is in place for 19th July.

M4 junction 12 Theale, Berkshire: surveys

Work to carry out surveys of the bridges at junction 12 take place this week. Lane closures will be in place on the roundabout and approach roads overnight, between 9pm and 6am, from Monday 15 July for 4 nights.

M4 junctions 14 to 15 Woodlands St Mary, West Berkshire: bridge repairs

Work to ensure road user safety by undertaking concrete repairs a bridge which carries the M4 over a local road near Woodlands St Mary continues this week. The B4001 beneath the bridge will be fully closed to road users and pedestrians until mid-August. A signed diversion will be in place via Ermin Street and Ramsbury Road.

M4 junctions 14 to 15 Welcome Break Services, West Berkshire: drainage

Work to ensure road user safety by addressing flooding issues at the Membury Service Area takes place this week. The westbound exit into the service area will be closed overnight, between 9pm and 6am, on Monday 15 July.

In addition, customers within the eastbound service area will be escorted out overnight on Tuesday 16 July.

M27 junctions 3 to 4 Southampton, Hampshire: bridge reconstruction

Work to maintain journeys and ensure road user safety by replacing the Romsey Road bridge near junction 3 continues this week. A 50mph speed restriction is in place on the M27 east and westbound carriageways beneath the bridge until winter 2019.

M27 junctions 4 Southampton to 11 Fareham, Hampshire: smart motorway

Work to improve journeys by converting the M27 into a smart motorway continues this week. 24 hour narrow lanes and a 50mph speed restriction will be in place until 2021.

M271 Southampton, Hampshire: roundabout improvements

Work to demolish the footbridge at the Redbridge Roundabout takes place this week. The Redbridge Roundabout will be closed from 9pm on Friday 19 July through to the evening of Saturday 20 July.

M27 traffic wanting to access Southampton City, including the port and cruise terminals should use M27 junction 5.  Traffic wanting to access locations in and around the New Forest National Park, should use M27 junction 2.

Walkers and cyclists will be diverted onto an alternative diversion while the bridge itself is demolished.

A3 Guildford, Surrey: slip road widening

Work to improve safety widening the southbound slip road at the Stoke Interchange continues this week.  Narrow lanes are in place on the southbound exit slip road at the Stoke Interchange 24 hours a day until August.

A3 Ockham, Surrey: safety barrier

Work to ensure road user safety by replacing sections of old safety barrier near Ockham continues this week. Lane closures will be in place on the north and southbound carriageways overnight, between 9pm and 6am, until Tuesday 27 August (Monday to Friday only).

A31 Cadnam to Ringwood, Hampshire: road markings and resurfacing

Work to resurface a section of the A31 westbound carriageway near Picket Post and renew road markings along the A31 and M27 continues week. The road will be closed from junction 2 of the M27 to Poulner Hill at Ringwood overnight, between 10pm and 6am, until Tuesday 23 July (Monday to Friday only, and not on Friday 12 or Friday 19 July). A signed diversion will be in place via the A36 to Salisbury then the A338 to Ringwood.