Five weeks of roadworks to close A404 between High Wycombe and Marlow A stretch of the A404 will be closed overnight for five weeks whilst roads are being resurfaced. The southbound carriage will be shut to drivers from 9pm to 6am from Handy Cross in High Wycombe to Westhorpe roundabout at Marlow. With work set to start tonight and finish on June 18 signed diversions have been put in place via Wycombe Road. There will also be overnight closures on June 28 and 29 where the A404 southbound carriage will shut between Marlow Westhorpe Interchange and the Bisham roundabout. Highways England said on their website: "We’d advise all motorists to stick to the signed diversion route as this has been chosen with both suitability and safety in mind.