A rolling roadblock was used instead of a full carriageway closure and the installation was completed within 30 minutes. The gantries will carry the signage and technology that will allow the hard shoulder to operate as a traffic lane during busy periods on the 24km of carriageway from J10 to J13.
The plan is in line with the Highways Agency Managed Motorways programme.
The scheme is due to be fully completed in spring 2013.
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