Overview
- National Highways has published a sequence of overnight closures affecting the M4 westbound entry slips at Junctions 4 and 19 on Monday, November 16 into early Tuesday, November 17 and an ongoing M3 southbound exit slip closure overnight until Friday, November 27, with a further M3 northbound overnight surfacing closure planned from December 7–12.
- The M4 Junction 4 westbound entry slip will close for horticultural works between 10pm and 5:30am and the Junction 19 westbound entry slip will close for electrical works between 9pm and 6am, with a signed diversion for J19 via the A4174, A38 and M5.
- National Highways says the works are timed overnight to limit daytime disruption, but diversion routes will add journey time for long-distance and early-commute trips and may use local A-roads such as the A34 at Three Maids Hill and the A33 at the Cart and Horse junction.
- Drivers are urged to follow the clearly signed diversion routes, allow extra travel time, avoid relying on satnav guidance where diversions are in place, and check National Highways live updates because the published dates and times are provisional.
- If changes are needed National Highways will update schedules and signage, so local authorities, commuters and long-distance travellers should monitor traffic information before setting out and plan alternative routes where possible.