The 210-metre long viaduct is a major engineering structure in the project to link the A89 and A6 motorways north-east of Lyon, completing the last 5.5 km section of highway that will soon provide a continuous motorway link between Bordeaux and Geneva.

Its innovative design features weathering steel beams which will provide the viaduct with natural protection and durability. It’s the first time APRR used this technology with Eiffage Génie Civil & Eiffage Métal.

The launch operation entailed sliding the deck horizontally on the structure already erected by means of a pulley and winch system.

The average rate of progress was between 5 and 10 metres an hour. The first launch was operated on last December 7.

Look at this live timelapse  : http://smart.aprr.fr/viaduc-semanet.html