More than 30 zero-emission machines are operating across Kent and Essex as part of the Lower Thames Crossing project. The fleet is on course to reach around 150 machines at peak construction in 2028.
The project is using only electric, hydrogen and hydrotreated vegetable oil (HVO) powered equipment. Diesel machinery has not been used on site since 2025.
Zero-emission machines on site today
The current equipment includes 20-tonne excavators, rollers, tractors, telehandlers and hydrogen generators. The Construction Equipment Association has predicted this will be one of the largest zero-emissions deployments for infrastructure anywhere worldwide.
Work started in early 2026 on the new road and tunnel beneath the River Thames. The project aims to be the first major UK infrastructure project to achieve carbon neutrality.
Carbon pathfinder for UK construction
The Lower Thames Crossing was designated a carbon pathfinder project. Its goal is to reduce carbon emissions and demonstrate low-carbon methods at scale.
This approach has been adopted by UK projects with a combined value of over £30 billion, including Sizewell C, Anglian Water, and East West Rail schemes.
Green hydrogen powering tunnel portal
The project sources green hydrogen from GeoPura, a British supplier. GeoPura has invested in a production facility at the Port of Tilbury to support the scheme.
The northern tunnel portal site operates entirely on hydrogen power, cutting emissions during construction.
Benefits beyond construction
The 2025-26 Sustainability Report outlines further commitments, including local skills and nature.
A Skills Hub in Gravesham has provided free construction training to more than 150 local people. Over 600 local businesses have engaged with the project to explore work opportunities.
A new nature site near Thong village marks progress on creating more than 3,000 acres of green space along the route.
Archaeological digs are uncovering local heritage in affected areas.
Reducing congestion, improving routes
The Lower Thames Crossing will ease congestion at the Dartford Crossing. It will build a more reliable route linking South East ports with the Midlands and the North.
Planning permission came in March 2025. Public funding was confirmed in November 2025, enabling construction and private investment to begin.
The new road is expected to open in the early to mid-2030s.
