The road then passes Stoneleigh Park Road traffic lights, for the railway station, or Bradford Drive, and Thorndon Gardens traffic lights. See traffic mentioned below. The road bisects a northern spur of West Ewell where it meets the B284, again, at Ruxley Lane. The B284 then branches off at the next junction on Worcester Park Road just before non-humped Tolworth Court Bridge over the Hogsmill stream. The A240 then enters the Royal Borough of Kingston upon Thames in Greater London as it goes over the Hogsmill River, a tributary of the River Thames at Tolworth Court Bridge. It then goes under another railway bridge by Tolworth railway station before crossing the A3 at the Tolworth Junction, a grade separated roundabout, which the A3 takes uninterrupted. In rush hour, traffic jams from Tolworth junction can stretch to the junction with Thorndon Gardens. Now as a non-primary road and a single carriageway road again, the A240 continues north-west as commercial Tolworth Broadway passing a well-known landmark, Tolworth Tower, before becoming longer Ewell Road which gently ascends from 24 to 32m where it crosses the South Western Main Line northeast of Surbiton railway station. The road turns north-by-northwest with the tangent before this bend being a short link road (A3210) the first of three straight roads to central Surbiton. In north Surbiton it winds downhill quickly between has two junctions with roads that form the B3363 to central Surbiton. From then on it heads straight towards the B3365 , the link road to the A307 where the road bends to the north. It passes County Hall and Kingston University (Penrhyn Road) as the road approaches its end at a roundabout by Kingston College and the Hogsmill River in Kingston town centre. Bus lanes are incorporated in the Greater London section between the junction with the A3 and its terminus at Kingston.