This article is about the current A2003 in Dorking. For the original A2003 in Ewell, see A2003 (Ewell).
Northbound on the A2003 at the junction of Station Road (foreground) and Chalkpit Lane (ahead)
The A2003 links the Dorking one-way system to the A24 north and south of the town centre.
The road starts at traffic lights on the A24 just north of the approach road to Dorking station. It heads southwest along the pleasant, tree-lined Ashcombe Road before turning left at a mini-roundabout to head south along the more suburban Chalkpit Lane. The North Downs Line (which does not serve the Dorking station just mentioned) is soon crossed and the road continues on into the town centre, meeting the A25 at a T-junction. That road is the one-way town centre ring road, although traffic is allowed to turn right to avoid going round almost the whole loop in order to head west.
There is now a multiplex clockwise along the A25 ring road. Traffic turns left to head along the narrow West Street to a set of traffic lights. The mainline of the A25 continues ahead whilst we bear sharply right to continue along the ring road. We head south along South Street, climbing as we do so. After passing Sabre House on our right the A2003 regains its number by turning left. The ring road continues ahead to carry northbound traffic off the A2003; this bears right into the residential Vincent Lane to reach traffic lights at the bottom of the hill, where the A2003 turns right then very soon left to leave the loop.
After leaving South Street the A2003 continues south along Horsham Road. It zigzags through the suburbs and goes over the top of a hill before descending to end at a roundabout back on the A24.
The southern section of the A2003 was the pre-bypass route of the A24 through Dorking, and this included the short loop of London Road by the stations. It was renumbered when the bypass opened in 1934. This section originally included South Street, which was taken over by the A25 when the town centre loop was put in place.
The northern section of the road was never part of the A24 and indeed remained unclassified until at least the 1960s when it also took on the A2003 number.