Delta Junction
HS2’s Delta Junction is a triangular section of line, enabling trains to travel between London and Birmingham, Birmingham and Manchester, and direct between London and Manchester without stopping at Birmingham.
It is made up of embankments, cuttings and a total of 13 viaducts taking high speed tracks over motorways, local roads, existing rail lines, rivers and floodplains. The viaducts include 6 precast segmental viaducts, 4 composite viaducts and 3 low viaducts.
Delta Junction map
Precast segmental viaducts (PSV)
Segmental viaducts have standard spans of 45 metres with decks built off concrete precast segments which are prefabricated at HS2’s Kingsbury Precast Yard at Lea Marston. The 6 precast segmental viaducts are:
- River Tame East and West
- Water Orton 1 and 2
- Coleshill East and West
Around 3,000 deck segments for the Delta Junction are being produced at HS2’s nearby purpose-built factory near Lea Marston. The segments and other materials are transported to site using haul roads to reduce HS2’s impacts on local roads.
Composite viaducts
Composite viaducts have standard spans of more than 45 metres with their decks built off weathered steel boxes or beams, with a concrete deck on top. The four composite viaducts are:
- M42/M6 Link Road East and West
- River Cole East and West.
The M42/M6 link viaducts – the two parallel viaducts that cross these roads – were the first Delta Junction structures to be installed, with the final of four viaduct deck pushes completed in September 2024.
Low viaducts
Low viaducts have standard spans of 25 metres with their decks built off standard concrete precast beams, with a concrete deck on top. The 3 low viaducts are:
- M42 Coleshill North and South
- Watton House.
Delta Junction design
HS2’s landscape architects and engineers from Systra and Mott MacDonald, working closely with architects Weston Williamson + Partners, have developed plans for connected and accessible areas that will include tree planting and new wildlife habitats around the Delta Junction viaducts.
Our goal for the landscape design is to tie the viaduct structures into the local landscape and create opportunities to enhance it. This includes improved connections through the Delta Junction area, which will be developed with new paths and cycle routes set within a nature rich corridor.
Slide 1 of 2: View from public path looking at River Cole Viaducts with river partially flooded
Slide 2 of 2: View of Chattle Hill Structure and Water Orton Viaducts looking southwards.
What we're delivering for the Delta Junction
River Cole Viaducts and Chattle Hill Structure
The HS2 route crosses over the River Cole on two parallel viaducts, while the Chattle Hill Structure takes the line over Lichfield Road.
Water Orton Viaducts
The Water Orton Viaducts will be made up of two viaducts that will hold 700 metres of new HS2 track above the River Tame and M42.
River Tame Viaduct
A precast segmental viaduct at the northern tip of the Delta Junction, crossing the River Tame near Water Orton.
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