Yesterday I drove through Atlanta as the construction season is starting to ramp up, so I am very impressed with this pavement replacement project in Switzerland. They simply erect a bridge over a section of the road so that cars can drive right across while work is going on underneath! The crew carves up the old pavement, repairs and prepares the sub-pavement, lays new asphalt, steamrolls it smooth, and cleans up the mess, before moving the bridge to a new repair section. Here’s a machine translation of the YouTube description:
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The mobile ASTRA Bridge construction site bridge has been in use again on the A1 in the direction of Zurich since the beginning of April 2024. The decking work under the ASTRA Bridge is progressing according to plan. While work is going on under the bridge, traffic above is moving in two lanes at 60 km/h.
You have to wonder how long it takes to move the bridge, because they probably do have to divert traffic for that part- or do they? Here’s another video from the Swiss Federal Roads Office showing how the ASTRA Bridge is erected.
So yes, they close lanes to put the bridge up, but even so, it is a minimal closure compared to the weeks that lanes are closed in the US while miles of highway are repaved at a time. -via Boing Boing
Source: neatorama