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London Underground

Sustain work in partnership with London Underground to tackle infrastructure carbon

London Underground is carrying out an ambitious long term upgrade programme of its stations and as a signatory to the Infrastructure Carbon Review, needed a proof of concept demonstrating that lowering carbon lowers cost.

Produced first whole life carbon model of an underground station capacity upgrade

Identified carbon reduction potential in capital and operational carbon

Model ready to integrate into the design process

Challenge

  • London Underground is a key part of the capital’s transportation infrastructure, and has significant
    upgrade programmes planned for the
    coming decades
  • The organisation is working to reduce energy consumption and carbon outputs, and build sustainability in order to meet the Mayor’s London Plan
  • As a signatory to the Infrastructure Carbon Review, London Underground wanted to understand where the carbon lies in major stations capacity upgrades in order to better unlock innovative carbon and cost reductions at the design stage when procuring the works

Solution

  • Camden Town station capacity upgrade programme was chosen for a ‘proof of concept’ study
  • Models were developed, incorporating the current RSSB embodied carbon measurement tool, to analyse operational and capital carbon in stations – producing a whole life carbon projection and identifying hotspots
  • A stakeholder engagement exercise was carried out with senior management, procurement and the station development teams to help raise awareness of where the carbon intensive aspects lie
  • A range of innovations were modelled,focusing on products and practices that could reduce the carbon hotspots
  • Recommendations were made on amending the procurement process to drive innovations to reduce both carbon and costs

Results

  • The study identified that more than 60% of whole life carbon resides in the capital, rather than operational works of the station design, particularly in areas such as concrete and construction waste
  • The project teams have adopted the models to use as the station moves through development and provide a framework for carbon management
  • London Underground is now engaging with the Rail Safety & Standards Board to seek to further develop their carbon measurement tool to improve its use in projects such as the stations capacity upgrade programme
Sustain have helped us develop a whole life carbon model and carbon baseline for our ‘proof of concept’ station. Coupled with recommendations describing how to include carbon in future procurement processes we have now started our journey towards lower carbon and lower cost station upgrades- London Underground

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