The bridge reached the end of its operational life and was beyond simple repair. Not replacing the bridge would have meant restricting the weight of vehicles that use the bridge and closing lanes to carry out maintenance, disrupting traffic and rail operations in the long term.
We are investing around £25m to rebuild the Upper Holloway Bridge. This is part of our programme to improve London's roads and public spaces.
We have replaced the bridge deck which sits beneath the road and strengthened the abutments that support the bridge from below.
The new bridge has an expected lifespan of 120 years.
Utility pipes and cables (carrying gas, electricity, water and telecommunications) in the carriageway have been moved to a new service bridge. This will reduce the need to close traffic lanes on the road bridge during future maintenance of utility pipes or cables.
The project is divided into three key phases:
Works to demolish and replace Upper Holloway Bridge over the Christmas and New Year period 2016/17 were completed as planned.
The A1 Holloway Road has now re-opened to traffic in both directions on schedule. One lane remains closed in each direction for safety reasons.
We are now completing the final stage of work to the bridge and preparing Upper Holloway station to re-open in February 2017.
Our contractor Hochtief (UK) installed a new service bridge in June 2016 during a full closure on the A1 Holloway Road.
We moved the pipes and cables (carrying gas, water, electricity and telecommunications) from the existing bridge to the new service bridge.
During this move, we discovered the utility services in and around the Upper Holloway Bridge were unexpectedly complex. We also found difficult ground conditions and a leaking water main. This means we needed to do more work than we had originally planned to safely move the utility services before demolishing and rebuilding the bridge.
Bus routes 17, 43, 271 and N41 have returned to their normal routes along the A1 Holloway Road.
Until early February 2017, bus route 263 will run between Holloway, Nags Head and Barnet Hospital. It will not serve stops between Holloway, Nags Head and Highbury & Islington station.
There have been changes to bus stops at Archway. See the Archway gyratory travel advice page.
Some bus stops on Holloway Road have been temporarily moved and will be reinstated at the end of the project:
Pedestrians at Upper Holloway can now use the eastern footpath. The western footpath is closed while we carry out final paving works and prepare Upper Holloway station for re-opening.
For the safety of pedestrians and cyclists, a temporary 20mph speed limit has been introduced between Hampden Road and St John's Villas on the A1 Holloway Road. This will remain in place until the works finish in 2017.
Some parking bays in Rupert Road and Hampden Road have been suspended to provide space for storage and worker facilities. The site office compound will remain in Hampden Road and Rupert Road until the works are completed.
Loading bays outside 589 and 692 Holloway Road will remain suspended until the works are completed.
Upper Holloway station is closed until February 2017 while works are completed to electrify the Gospel Oak to Barking line. The electrification works are being completed by Network Rail.
We will ensure that, where possible, works at the station take place when train services are not running.
We will run a replacement bus service. See London Overground closure travel advice.
As agreed with the London Borough of Islington, our main working hours are between 08:00 and 18:00. Some overnight works may be needed to complete the project as quickly as possible.
We'll continue to monitor noise levels and make every effort to minimise it where possible. We are using a range of measures to reduce noise, vibration and disruption including:
We are working closely with the London Borough of Islington and Network Rail to minimise disruption and ensure the works proceed as safely, efficiently and quickly as possible.
We are delivering this project in partnership with Hochtief (UK) Construction, Ramboll and Parson Brinckerhoff, and Skanska.