A307 road (Great Britain)

A307
The A307 Portsmouth Road running through Thames Ditton.
Route information
Length:	13.2 mi (21.2 km)
Major junctions
North end:	Kew
	A205 road A316 road A305 road A308 road A240 road A243 road A309 road A244 road A245 road A3 road
South end:	Cobham
Location
Primary destinations:	Richmond, Kingston upon Thames
Road network
Roads in the United Kingdom Motorways A and B road zones

The A307 road runs 13.2 miles (21.2 km) through SW London and NW Surrey. It is primary at the north-east end; the remainder is non-primary, generally superseded in the mid-twentieth century in two stages by newer alignments of the Portsmouth Road, the Kingston bypass and Esher bypass of the A3 road which runs along a slightly oblique axis.

It begins at the junction with the A205 South Circular Road beside Kew Green (51°28′58″N 0°17′13″W / 51.4827°N 0.2869°W / 51.4827; -0.2869 (A307 road (northern end))), where it is named Kew Road. It then runs towards Richmond upon Thames or Richmond, London, through the west of Kew. At the junction with the A316 in Richmond it becomes a non-primary A-road through the town centre then heads through Petersham where for fewer than 100 metres it kinks west and then travels south through Ham. A B-class road, the B353, leaves the A307 in Kew and runs around the town centre and up Richmond Hill and by-passing Richmond, before rejoining the A307 at Petersham.

It bisects the north of the town before becoming the western half of the one-way system in Kingston upon Thames. Here it is briefly merged with the A308. It leads south to the northern end of the A240, for 200m travels west to the River Thames, and resuming south becomes at last the old version of the Portsmouth Road (which is also its name here). It runs next to the River Thames, heading through Surbiton. It passes a junction with the A243, shortly before exiting the borough at Seething Wells there next to Long Ditton.