A320 improvements are underway between Ottersham and Chertsey, running until 2026. The ยฃ41.8 million project overseen by Surrey County Council will increase capacity on this busy stretch north of Woking. This will unlock new housing and support economic growth in the region.
The A320 improvements is a partnership between Surrey County Council, Runnymede Borough Council and Homes England, which is funding the work.
Runnymede needs to deliver 500 homes every year until 2030 to meet demand. And the A320, as the key link road between the M25 and communities including Woking, Ottershaw and Chertsey, is able to cope with increased numbers of vehicles.
So improvements to the road – including new cycling and pedestrian routes – will support development in the area. It will also improve access to St Peter’s Hospital.
A320 and unlocking local growth
The works will ensure there is extra capacity on the busy stretch of road between Chertsey and Ottershaw to support delivery of the Runnymede 2030 local plan.
It will make sure all the junctions and roads work well together to improve traffic flow. There will also be improvements for walkers and cyclists, including new crossing points and wider foot and cycle paths, and improved access to public transport.
The Runnymede 2030 Local Plan is a blueprint to guide development in the area. It was approved in 2020.
The plan commits to delivering 7,507 high quality additional homes in Runnymede in the period 2015-2030, an average of 500 homes a year.
There is also a commitment to ensuring a mix of employment, retail, leisure, community uses and activities and infrastructure. Plus, protection for the environment and improving accessibility to a range of sustainable and active travel choices.
Of the sites allocated for housing, a large number are reliant on the A320 improvements.
This includes a new Longcross Garden Village, a sustainable settlement of at least 1,700 residential units. And a further 400 homes on St Peter’s Hospital in Chertsey.
What will the A320 improvements deliver?
There will be roadworks on the A320 between Chertsey and Ottershaw from early 2025 until 2026.
Works include:
- Improvements to traffic lane facilities and full signalisation of St Peters Roundabout
- Provision of an additional, third traffic lane eastbound on St Peters Way East
- Provision of a new and improved Ottershaw roundabout with greater circulatory capacity with widened approaches and exits providing additional traffic lanes
- Improvements to the M25 junction 11 interchange, including full circulatory signalisation and widened northbound and southbound exit slip roads with new dedicated left turn lanes
- Provision of a new roundabout at the Holloway Hill/ Green Lane junction, with flood reduction initiatives, including the construction of attenuation ponds and shallow swales
- Provision of shared use footway/cycleways where possible
- Improvements to Guildford Road, near Salesian School, include installation of a dedicated drop-off layby / bus bays on the east side of Guildford Road along the front of the school
- Improved lighting for all road users and provision of safe crossing facilities for pedestrians and cyclists throughout the whole scheme
Review the proposals in detail on the Surrey County Council Commonplace website.
Construction works – phase one
Contractors started phase one of the A320 improvements in April 2025.
The initial ten week phase will see lane closures on St Peter’s Way between the St Peter’s Way roundabout and the M25 junction 11 roundabout. A westbound lane closure is also in place on St Peter’s Way.
Works will include:
- an extra lane constructed from the St Peter’s Way roundabout towards the M25 on the A320 eastbound
- widening of the approach onto the St Peter’s Way roundabout from the M25 on the A320 westbound
- widening of the northbound approach onto the St Peter’s Way roundabout from Guildford Road
- widening of the footpath from the St Peter’s Way roundabout towards St Peter’s Hospital
- resurfacing of the entire St Peter’s Way roundabout
The A320โฏGuildford Road will be closing in both directions, between the Ottershaw and St Peterโs Way roundabouts from 5am on Saturday 14 June to 5am Monday 16 June. The closures are needed to divert the underground services that lie beneath Guildford Road.
The next phase of works in the autumn will see works commence at the Green Lane / Holloway Hill junction.
Detailed information will be shared on the contractors construction website as work progresses.
