Major HS2 motorway works planned across the West Midlands in 2026 – Key information

HS2 will be carrying out a series of major engineering works over the M42 and M6 between June and November 2026. These works are required so that we can install three new railway structures for Britain’s new high-speed railway. 

The current programme of weekend closures is scheduled as follows:

All dates remain subject to consent and operational requirements.

HS2 and BBV will be holding a series of community information events in collaboration with National Highways to help residents, businesses and commuters understand the works and prepare for the closures. 

These events will provide: 

• Details of planned motorway closures 

• Information on diversion routes 

• Opportunities to ask questions and speak with the teams 

• Updates on the project  

For details visit our Events webpage

Plan ahead before you travel

You will still be able to reach your destination. Please follow the fully signed diversion and allow extra time for you journey.

For real-time updates on roadworks and closures, including HS2 activities on public highways, visit one.network.

M42 twin-box structure.

The first major operation begins on Friday 26 June 2026 with installation works for the M42 twin-box structure. 

Once complete, the 300-metre-long structure will allow trains to travel above the motorway while vehicles continue through the box below. 

Engineers will install 175 individual beams weighing between 56 and 92 tonnes across four weekend closures. 

The structure has been designed using modular construction techniques, allowing much of the work to be completed without closing the motorway. 

Water Orton viaduct installation 

In nearby Water Orton, engineers are preparing to extend two viaducts that will carry high-speed trains towards Birmingham Curzon Street and the Washwood Heath rolling stock depot. 

Rather than building the final sections using traditional cantilever methods, the remaining viaduct spans will be assembled beside the motorway and moved into place using self-propelled modular transporters. 

This innovative approach significantly reduces installation time and minimises disruption for motorists. 

Works are scheduled to begin on Friday 24 July 2026. 

M6 South Viaduct West 

The final major operation involves installation of the M6 South Viaduct West near Chelmsley Wood. 

Using a fully restrained deck-slide process, engineers will move the viaduct into position while keeping traffic moving during key phases of the operation.