Crossrail West Outer Section

We designed and implemented major track and electrification improvements to the Great Western railway.

Our multi-disciplinary teams delivered a range of works for the vital Crossrail project – the new high frequency, high capacity railway connecting London and the South East.

We implemented major track works, civil engineering and Overhead Line Electrification (OLE) for the West Outer section of the line at West Drayton, Slough and Maidenhead.

We constructed and commissioned all track remodelling works, including two new bridges and the design and build of OLE systems.

This line ensures efficient, reliable rail services through the capital. Our electrification works provide a cleaner, quicker train service between Maidenhead and London Paddington. This project is also a key component of the on-going electrification of the Great Western Route.  

Innovating for efficiency

Our in-house design teams carefully planned the creation and delivery of the OLE works on site. To do this, we brought together complex material logistics, component types and engineering data into one single system, or ‘Workbank’, to coordinate the works. This innovative tool allowed us to complete works efficiently and on time.

Construction of OLE is a high risk activity, involving working at height and significant manual handling. To ensure safe delivery, the teams worked to engineer out risk wherever possible. For example, we developed a bespoke tool to lift OLE steelwork into place, rather than manually lifting the equipment.

We also successfully moved the scheduled completion date forward through large-scale materials management and accelerated design processes, along with successfully re -sequencing of track works.  To ensure minimum disruption to passengers throughout the project, the majority of core engineering works were completed while train services continued.


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