Upgrade of the M3 between junction 9 (the A34 at Winchester) and junction 14 (the A33 and M27 north of Southamnpton) to Smart Motorway standard. This part of the M3 suffers particularly high levels of traffic, being a single link connecting the major conurbation and port at Southampton to the wider UK.
The scheme will see the hard shoulder converted to a fourth permanent running lane from junction 9 to junction 13 (Eastleigh); from there to junction 14 there are already four lanes in each direction. New emergency areas will be installed, along with new facilities called "safe areas" at junctions 11 and 12 - it is not entirely clear what this will involve. Communications infrastructure will also be significantly upgraded to provide surveillance cameras and electronic message signs.
This scheme is part of the Smart Motorways programme of works.
With thanks to Tom Kitcher for information on this page.