M3 J2-4A Managed Motorway

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Scheme Outline

Scheme details

Under construction
Upgrade to existing road under motorway restrictions
£ 138-198m
Highways England
Region: South East
Highways Agency
18 km
11 miles

Upgrade of the existing M3 between junctions 2 and 4a to allow dynamic hard shoulder running (use of the hard shoulder as an extra lane at peak times). Where necessary, junction capacity will be increased to prevent traffic queues building up on the slip roads and encroaching on the main carriageway.

This scheme was introduced as part of the National Infrastructure Plan in autumn 2011.

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24 October 2014 Under Construction! Advance work started Aug 2014, with 13 miles of 50mph limit and cones in use from 1st November 2014.
17 January 2016 Work appears to be progressing well. Some gantries and MS4 signal masts have been erected, but nonetheless remain empty. Contraflows have switched around, to accommodate progress between J4A and J3.
27 September 2016 This was due to be completed in December 2016, but has now been delayed until June 2017 to incorporate the replacement of Woodlands Lane bridge.

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More information

Official website
Highways England: M3 Junctions 2-4a Smart Motorway

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With thanks to Jonathan Harmer, Tobye, Michael Pritchard and Bert for information on this page.

This scheme was last updated on 30 September 2016.