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Project overview:

Hill & Smith Infrastructure, BmJV and their delivery partners implemented a pioneering approach to central reserve Rigid Concrete Barrier (RCB) installation across two major schemes on the Strategic Road Network. These projects supported the SMP Alliance’s goal of shifting construction offsite to improve safety, efficiency and programme certainty.

At the M40–M42 Interchange, the team trialled and successfully delivered a new RCB system using precast foundations and surface-mounted H2 barriers. This eliminated the need for drainage diversions and enabled the 10.5km installation to be completed three months ahead of schedule.

The approach was further refined and scaled for the M42 J4–7 Dynamic Hard Shoulder Enhancement, where a newly developed low-carbon H1 barrier was introduced. Designed to integrate seamlessly with the H2 system, it contributed to a carbon saving of 129,760 kg CO₂e.

These projects demonstrate the impact of early engagement, collaborative learning and offsite innovation in delivering safer, faster and more sustainable outcomes across the UK’s road network.

Download the case study to learn how Hill & Smith Infrastructure delivered innovative barrier systems whilst adapting to complex site conditions, streamlining offsite construction and collaborating closely with stakeholders to achieve early completion and significant carbon savings.

Download the PDF

 

M40-M42 Interchange & M42 J4-7 DHS

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