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A31 Local Enterprise Partnership (LEP) Project

The A31 Local Enterprise Partnership (LEP) project aims to improve the drainage and resilience of sections of the A31 network

Drainage work and carriageway surfacing - August 2019

We are carrying out drainage work and carriageway surfacing (including some vegetation clearance) on A31 Hogs Back and A31 Farnham Road, Guildford.

We will need to close the A31 in various locations in order to complete our works.

Road closures

The information below is subject to change. We will keep you updated on this website and via our roadworks map, where you can sign up to receive instant email alerts when the details of any of our road works changes.

A31 Hogs Back/Farnham Road


Down Lane to A3 slip road

Work information

  • Dates: 1-2 & 7-14 August
  • Duration: 7 nights (Monday - Friday nights only)
  • Road closure times: 8pm - 6am
  • A lane closure will be in place from 6am to 8pm for safety reasons.

Diversion route

Westbound traffic

A31 Farnham Road, Guildford Park Road, Madrid Road, The Chase, A3 Guildford and Godalming Bypass, A31 Hogs Back

Eastbound traffic

A31 Hogsback, A3 Guildford and Godalming Bypass, Egerton Road, The Chase, Madrid Road, Guildford Park Road, A31 Farnham Road

A31 Hogs Back (westbound)


  • Works area: East of the cafĂ© to west of 'Cedarfield'
  • Closure: Puttenham slip roads (Wanborough Hill/Puttenham Hill) to A331 slip roads (Runfold roundabout)

Work information

  • Start date: 14 August
  • Duration: 11 nights (Monday - Friday nights only)
  • Times: 8pm - 6am

Diversion route

A3 Guildford and Godalming Bypass, A3 Portsmouth Road, A3 Hindhead Tunnel Road, A333 Portsmouth Road, A287 Tilford Road, A287 Churt Road, A287 Frensham Road, Old Farnham Lane, Great Austins, Tilford Road, B3001 Station Hill, A31 Farnham Bypass.

Scheme overview

The A31 Local Enterprise Partnership (LEP) project has been in the planning and development process for a number of months and aims to improve the drainage and resilience of sections of the A31 network. This project is being partly funded by the Enterprise M3 LEP and the objective is to mitigate the effects of major flooding events in the future. The project is being delivered in several phases some of which include drainage improvements, repairs and carriageway surfacing.

Some of the benefits of the works include:

  • Improving overall road safety for road users
  • Reducing the likelihood of surface water flooding
  • Prolonging the life of the carriageway
  • Helping to deliver economic prosperity in Surrey

Future works

More resurfacing and drainage works will be carried out along the A31; we will notify you in advance of all further works.

Frequently asked questions

It's a very long road, how are these works going to be carried out?

The works will be carried out in sections and the anticipated dates and locations will be published on this website prior to works commencing.

What hours will you be working?

Most work will carried out on weeknights however there may be occasions where weekend working is necessary. Working hours at night are usually 8pm – 6am. Some work will be carried out during the day. Hours for these works will be confirmed on this website.

Will there be any road closures required?

Road closures will be required for the surfacing work. We will try to limit the disruption these closures will cause by undertaking this work on weeknights.

Most drainage improvement works will be conducted under lane closures during the day.

Files available to download