Balfour Beatty subsidiary Birse Civils has installed a 51 m span gantry across the east/west bound carriageway of the M62, at J23 to the east of Huddersfield.
A 450-tonne mobile crane was used by the fabricators, Briton, to install the gantry as part of an £11.8 million programme of works for the M62 J22-25 upgrade.
The project was awarded to Birse by the Highways Agency.
Other works on the technology upgrade project include foundation works for 20 MS3 motorway signs and cabling.
The scheme is being completed while the motorway operates at full 70mph speed limit, with Birse saying it therefore required careful safety planning and management.
The consulting engineer on the project is Carillion WSP.