Junction improvement programme - A30 Crooked Billet roundabout, Staines

This scheme is being delivered by Highways England (HE). Any questions or enquiries should be directed to their contact centre - 0300 123 5000, available 24 hours a day

Update 25 June

The work will take place overnight between 8pm and 6am, from Friday 2 July for three nights. Clearly signed diversions will be in place around the outer ring of the roundabout. We will be closing the road overnight as this is when traffic volumes are at their lowest. This makes it safer for the public and our teams while reducing delays to motorists.

Works overview

The A30 Crooked Billet roundabout is currently unbalanced, meaning the number of lanes varies as you travel through the roundabout, leading to unnecessary lane changing and safety issues.

We have developed an improvement scheme for the A30 Crooked Billet roundabout and construction work is planned to start in late May 2020, for 14 months. The planned completion date for the works is July 2021.

Work at the junction will include:

  • Realigning the east and westbound carriageway markings through the centre of the roundabout to avoid unnecessary lane changing.
  • Widening of the A30 eastbound exit lanes approaching the roundabout.
  • Removing the existing subway and replacing with new pedestrian and cycle routes across the roundabout. This will link into the new pedestrian/cycle routes towards Staines and Heathrow.
  • Upgrading and synchronising the existing traffic signals to improve traffic flow.
  • Upgrading and repairing the existing drainage system.
  • Upgrading street lighting and traffic signs.

These improvements will deliver many benefits, including a safer network with reduced accident rates, improved routes for pedestrians and cyclists, and improved signs and road markings to encourage good lane discipline. The work will also provide a more free-flowing network with less congestion and more reliable journey times.

Traffic management

To deliver the works safely, Highways England will need to use a combination of lane and road closures, and footpath diversions. Information will be provided through advanced warning signs ahead of the works starting, with clearly signed diversions in place for any full closures.

Work is initially planned to take place between the hours of 7am and 5pm, Monday to Friday. Access to footways and properties will be maintained during this time although there may be footpath diversions, which will be clearly signed if required.

Works will switch to overnight hours as the scheme progresses, and we will notify residents about this change of working hours in advance. Noise barriers will be used around the site and equipment with lower noise emissions will be deployed where possible.

A temporary Transport for London bus stop will be installed on the A30 eastbound carriageway in place of the existing bus stop.

If you need to travel while these works are taking place, we recommend that you plan ahead and allow more time for your journey. We have carefully planned and coordinated our works, but there may be some changes in the event of adverse weather, or other unplanned events.

More information is available on the Highways England website.


Highways England's current priority is to play its part in keeping the country safe, whilst supporting the movement of essential supplies, services and people who cannot work from home. We are following the government's policy which advises that construction activity should continue where it can be done safely. All our sites have strict safeguarding measures, in line with Public Health England guidance, to prevent the spread of Covid-19 and protect workers and the public.

Contact and updates

A Public Liaison Officer will be present for the duration of the scheme to assist with any feedback you may have. If you wish to receive additional advanced notifications and updates via e-mail or have any feedback regarding these works. please send your contact details to the following e-mail address: JIP@connectplusm25.co.uk

If you have any further questions about this work please contact the Highways England Customer Contact Centre on 0300 123 5000, available 24 hours a day.