The Open Guide to London: the free London guide - Differences between Version 5 and Version 4 of A40

Contents are identical

The A40 is one of the two principal road routes from the West into London, the other being the A4.

Most of the A40 is known as the Western Avenue. It's generally a 6-lane dual carriageway (3 lanes each way) with grade-separation (no traffic lights) until Gypsy Corner in Acton. (There is also one set after this at Western Circus, then grade separation over the Westway flyover until Lisson Grove.)

The A40 is extremely busy at rush hour, particularly at Hanger Lane which is the junction with the North Circular Road. Another blackspot is the lane-drop at Gypsy Corner.

If you are driving into London (see Drive yourself) on the A40 then keep an eye on the speed limits since there are speed cameras at regular intervals.

The A40 turns into the A501 Marylebone Road at Marylebone, which is very busy (part of the ring road around the congestion charge zone).

Oxford Street and Holborn are also numbered as the A40.

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