Transport for LondonChallenges
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Perryn Road Bridge
Underneath Perryn Road bridge
The new bridges need to be built in such a way that we can keep traffic flowing on the A40 and rail services running beneath the bridges.
Minimising disruption to local residents has been another key priority in the development of the final scheme. As much work as possible will be carried out during the daytime but for safety reasons, some work over the railway can only be carried out when trains are not operating. A three and a half year construction programme is required because there are only a limited number of periods each night when train services do not operate and the works depend on a set sequence of operations being completed one after the other, with little opportunity for parallel working.
- On this page
- Challenges overview
- Facts and figures
- To build the new bridges
- Challenges overview
- Maintain traffic flow on A40:
Two Lanes in both directions most of the time - Maintain rail services beneath bridges:
Including Heathrow Express and First Great Western - Minimise impact on local community:
Measures to minimise noise and dust - Maintain pedestrian/cycle routes and access to local properties
- Maintain Existing Services:
Including gas, water, electricity, telecoms
Facts and figures
- 100,000 vehicles use the A40 per day
- 800 trains, transporting 145,000 passengers travel underneath the bridges per day
- Train services operate 364 days a year, 21 hours per day
To build the new bridges
- 970 tonnes of steel girders will be used = weight of 130 London buses
- 6,870 cubic metres of concrete will be used = enough to fill four Olympic swimming pools
The existing highway layout and some of the challenges facing the project team
