A3000

The A3000 runs parallel to Chiswick High Road in west London, avoiding the Chiswick Roundabout. Although this junction was not foreseen in 1922 when the road number was allocated, a westward extension of the A4 (now the Great West Road) was under construction at the time.

Looking west along the A3000 as it passes beneath the start of the M4 motorway

The westernmost section of the A3000 Wellesley Road used to be one-way westbound, with eastbound traffic presumably using Clarence Road, which starts just to the west of the Chiswick Roundabout. Since 2021 it is no longer possible to exit Wellesley Road onto Kew Bridge Road A205 as the final few metres have been converted to a cycle way. This means all traffic in the local area must travel eastbound along the A3000 to get anywhere.

After the two directions join, the route continues east along Wellesley Road to run under the start of the M4 and the A4 slip roads. After going over the District Line by Gunnersbury station the road continues on to a roundabout on the corner of Turnham Green. It turns right along Heathcote Terrace, with the green itself on the left and Chiswick Town Hall on the right at one point. The road ends at the far corner of the green at traffic lights on the A315.

In 1922 the A3000 ended on the A315 to the west and A4 to the east; with the rerouting of the A4 and the institution of the South Circular, the A205 is now to the west and the A315 to the east although the route of the A3000 is unchanged. The road name at both ends is Chiswick High Road, emphasising that this was the main road until the construction of the present route of the A4 in the 20th century.