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Sunset time lapse of the A3 to the south west of London in March 2014. Over time the shutter speed changes so the traffic becomes more blurred and eventually just light streaks 20 seconds
More about the A3 road –
The A3, known as the Portsmouth Road or London Road in sections, is a major road connecting London and Portsmouth passing close to Kingston upon Thames, Guildford, Haslemere and Petersfield. For much of its 67-mile (108 km) length, it is classified as a trunk road and therefore managed by the Highways Agency. Almost all of the road has been built to dual carriageway standards. Apart from brief sections in London the road travels from that city in a southwest direction and, after Liss, in a slightly more southerly direction (SSW).
Close to its southerly end, traffic for Portsmouth is routed via the A3(M), A27 and M275 — the A3 becomes a single carriageway through some south Hampshire settlements (as exceptionally through Battersea, Clapham and Stockwell towards the northern end).