 The road is dualled each way in the section furthest from the River Thames, in north Surrey and forms one of the motorway spurs to the large town of Maidenhead.The South Kensington to Fulham section starts at the A4 road opposite Brompton Oratory and follows Fulham Road south-west past Chelsea and Westminster Hospital, where it jumps south a block to takeover the Kings Road.Through broad Fulham which traditionally, as bolstered by its associated London postcode, covers half of the borough, the road becomes New Kings Road, before it ends at the A219 road (Fulham Palace Road), 100m north of Putney Bridge.