 In conjunction with the A3 it provides an alternative to the congested A24 corridor through Morden and Merton.The A240 runs through three boroughs.Starting in Burgh Heath (Reigate and Banstead); most of its course is a direct route skirting Ewell (Epsom and Ewell) and its finishing section through Tolworth, Surbiton and the south of Kingston in the Royal Borough of Kingston upon Thames the A240's Greater London borough.