M42 drivers warned of major weekend closures in West Midlands 2026

Key Points

• Full weekend closures will shut both carriageways of the M42 motorway for scheduled construction work.
• Both northbound and southbound lanes will close between Junction 6 for Solihull and Birmingham Airport and Junction 9 for Curdworth and Coleshill.
• Surrounding slip roads and connecting links will shut at the same time, including the M6 Junction 4a southbound link and M6 Toll connectors.
• High Speed 2 workers need the closures to lift steel beams into place for the M42 Motorway Box and build concrete decks for the Water Orton Viaducts.
• National Highways and Transport for West Midlands warned drivers, flight passengers, and commuters to budget extra travel time and use official diversion routes.

Solihull (Birmingham Express) September 15, 2026 – Motorists, local businesses, and holidaymakers intending to travel across the West Midlands transport network are facing severe travel disruption following official warnings of major weekend closures along key stretches of the M42 motorway.

As reported by transport correspondents covering the regional infrastructure rollout, the upcoming full carriageway closures will suspend traffic between Junction 6 (serving Solihull, the National Exhibition Centre, and Birmingham Airport) and Junction 9 (Curdworth/Coleshill).

The planned interruptions are designed to enable engineering teams from High Speed 2 (HS2) and contractor Balfour Beatty VINCI (BBV) to safely undertake heavy construction works directly over the live motorway network. Transport authorities have urged all road users to prepare for significant delays and carefully review alternative travel arrangements before setting off.

Which specific sections of the M42 will be closed?

As detailed in public notices published by Transport for West Midlands (TfWM) and National Highways, the primary restriction involves a full weekend closure affecting both carriageways between Junction 6 and Junction 9.

The closures are scheduled to take effect from 21:00 on Friday 18 September until 05:00 on Monday 21 September 2026.

According to formal documentation released by HS2 Ltd, the closure perimeter covers:

• M42 Northbound: Closed from Junction 6 to Junction 9.
• M42 Southbound: Closed from Junction 9 to Junction 6.
• M6 Link Roads: The M6 Junction 4a southbound link to the M42 in both directions.
• M6 Toll Connectors: The M6 northbound Junction 3a link to M6 Toll T1, alongside the M6 Toll southbound link from T2.

Why are these weekend road closures taking place?

The closures are necessary to carry out critical structural installations linked to the construction of the HS2 high-speed rail line. As reported by infrastructure analysts tracking the project, engineers require an isolated, traffic-free environment directly beneath the railway alignment to safely maneuver massive pre-cast components using specialist heavy-lift cranes.

As documented in official project briefing papers issued by HS2 Ltd, the workforce will focus on two major structural landmarks during the closure window:

1. M42 Motorway Box: Contractors will position and secure vital structural steel beams over the motorway near Solihull, establishing the foundational frame for the future railway line as it crosses the arterial highway.
2. Water Orton Viaducts: Concrete deck installation works will advance across the motorway span in North Warwickshire, forming part of the multi-span viaduct structures carrying high-speed trains through the regional network.

What diversion routes and travel advice have been issued?

To manage the diversion of thousands of vehicles usually traversing this section of the strategic road network, National Highways has confirmed that fully signed diversion routes will operate continuously throughout the operation.

Drivers traveling long distances are strongly urged to utilize surrounding strategic motorways—such as the M6, M5, and M40—to bypass the central Solihull corridors altogether. Local traffic heading toward crucial hubs including Birmingham Airport, the NEC, and Birmingham International railway station will be directed along designated arterial routes via the A45 and local bypasses.

As stated by travel monitoring officers at Transport for West Midlands, passengers catching flights or attending large-scale events over the weekend should build substantial buffer time into their schedules to avoid missing connections.

Background of the M42 highway development

The M42 motorway forms a crucial segment of the Midlands orbital highway network, carrying vast volumes of freight, regional commuters, and international transit passengers every day. Junction 6, located at the heart of Solihull, acts as the primary gateway for Birmingham Airport and the National Exhibition Centre (NEC), making it one of the busiest highway intersections in the West Midlands.

Over recent years, this specific corridor has been undergoing extensive, multi-million-pound transformations. In addition to the overarching HS2 construction footprint—which includes the flagship HS2 Interchange Station built near Solihull—National Highways has simultaneously progressed a £282 million junction improvement scheme at Junction 6. This broader upgrade aims to alleviate long-standing bottlenecks, expand lane capacities, enhance pedestrian and cycling connections, and support predicted regional traffic growth over the coming decades.

Executing complex engineering feats across a heavily used motor arterial requires routine weekend closures. Major structural milestones—such as sliding entire bridge structures into place or lifting multi-tonne steel girders into position—cannot be safely managed under partial lane closures, rendering total highway shutdowns the only compliant safety option for civil engineering teams.

Prediction: How this development can affect motorists and regional commuters

The planned weekend closures on the M42 will exert immediate and widespread pressure across the West Midlands transport infrastructure, directly affecting several distinct road-user groups:

• Long-Distance Freight and Commercial Logistics: Commercial transport firms operating along the M42 freight corridor face increased journey times, elevated fuel costs, and driver-hour constraints as heavy goods vehicles (HGVs) are re-routed onto lengthy regional diversions.
• Airline Passengers and Event Visitors: Travelers heading to Birmingham Airport and visitors attending weekend exhibitions at the NEC are at significant risk of delays. Increased congestion on localized detour roads could cause missed flights or scheduled event entries if journey plans are not adjusted well in advance.
• Local Communities along Diversion Arterials: Surrounding local communities in Solihull, Coleshill, Water Orton, and North Warwickshire are likely to experience heightened traffic volumes, localized congestion, and elevated ambient noise levels as diverted vehicles pass through secondary roads.
• Long-Term Network Benefits: While short-term inconvenience is inevitable, completion of these bridge beam placements and viaduct deck installations brings the HS2 project closer to operational readiness. Once fully completed alongside National Highways’ Junction 6 upgrades, the region is projected to benefit from modernised travel hubs, reduced everyday congestion, and improved inter-city connectivity across the UK.