 Ringway 4 was new road, the south section of which became part of the M25 and M26 from Wrotham Heath to Hunton Bridge.Sections of the A405 and A414 through Hertfordshire are on the proposed line of Ringway 4.Ringway 4 was planned as a new rural motorway/dual carriageway connecting a number of towns around the capital including Sevenoaks, Redhill/Reigate, Leatherhead, Staines, Uxbridge, Watford, St Albans, Hatfield, Hertford and Hoddesdon.