FOI request detail

Bridge Condition Indexes

Request ID: FOI-0156-1920
Date published: 29 April 2019

You asked

Requesting Bridge Condition Indexes for all TfL bridges

We answered

TfL Ref: FOI-0156-1920

Thank you for your request asking for information about Bridge Condition Indicators (BCI).

Your request has been considered in accordance with the requirements of the Freedom of Information Act and our information access policy. I can confirm we do hold the information you require.

Please see the information requested attached.

Bridges and structures form a vital part of the Transport for London Road Network (TLRN) and it is essential to maintain them in accordance with safety and serviceability standards. A fundamental requirement to achieve high maintenance standards and to allow asset owners to understand the condition of their structural stock is to regularly undertake Safety, General and Principal Inspections of Highway Structures (in accordance with national guidance BD63/17). These inspections identify elements that might need further inspection, testing, monitoring, repair or replacement and to prioritise these works in accordance with their urgency and with the aim to guarantee safety and best value for money.

Each structure is broken down into its elemental parts when inspected and scored on its condition by the severity of any defect and measured against the extent. Through a nationally agreed asset management system – Bridgestation – further refinement of the inspection data allows a numerical score – Bridge Condition Indicator – to be calculated, with one specifically targeted at the primary structural elements (BCI crit) and one that encompasses the entire structure (BCI av)

This allows for a very detailed condition and risk profile to be identified and understood for each structural asset, which in turn facilitates a very targeted maintenance and asset management regime. For the avoidance of doubt, a low BCI does not suggest the structure is unsafe. This scoring identifies that enhanced inspections and/or temporary repair works are required and undertaken.

Please see the attached information sheet for details of your right to appeal as well as information on copyright and what to do if you would like to re-use any of the information we have disclosed.

Yours sincerely

Graham Hurt

FOI Case Officer

FOI Case Management Team

General Counsel

Transport for London


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