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M4 near Langley, Slough and Windsor closes for bridge demolition

David Dixon Datchet Road bridge over the M4David Dixon
Datchet Road bridge will be demolished during the weekend closure

A section of the M4 has been shut as part of ongoing works to turn it into a so-called smart motorway.

It is shut in both directions in Berkshire between junction five at Langley and junction six for Slough and Windsor until 06:00 GMT on Monday.

Datchet Road bridge will be demolished, Highways England said.

Old Lake End Road bridge near Dorney, Buckinghamshire, and old Riding Court Road bridge at Datchet have already been demolished.

The motorway is being upgraded from junctions three to 12.

Highways England Old Ascot BridgeHighways England
Ten bridges have previously been demolished as part of the works including Old Ascot Bridge

The project started in 2018 and is due to be completed in spring 2022 at the cost of £848m.

Smart motorways involve using the hard shoulder as a running lane and using variable speed limits to control the flow of traffic.

Highways England MapHighways England
The smart motorway project is due to be completed in spring 2022

Highways England said it would temporarily increase the speed limit to 60mph (97km/h) across three full width lanes between junctions eight and nine to 12 in late-December.

The fourth lane would remain closed, it added.

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