Pilot mobile bridge project with Cometto

To avoid lane reduction during peak hours, a 240 metre bridge will be built above a roadway due to be resurfaced in Switzerland.

The bridge will divert traffic above the road due to be resurfaced

Developed by the Swiss Federal Roads Office (ASTRA), this mobile bridge will allow resurfacing of the motorway without obstructing traffic or creating a traffic jam.

The traffic will therefore be diverted above the road and drivers can drive up to speeds of 60 kilometres per hour. Around 100 metres are available under the bridge for the actual construction work.

Once the work under the bridge is finished, the mobile bridge will be moved a further 100 metres by remote control for the next construction section.

The bridge itself consists of a drive-on ramp, 18 portals, 19 intermediate sections and a departure ramp.

Cometto will supply 22 power packs, 22 valve packs, 2 control cabins, 72 MSPE bogies for the gantries, 8 SPMT bogies for the ramps, 16 ModulMax SP-E bogies for the ramps and the satellite navigation system for the complete bridge.

The individual sections for the ASTRA Bridge are currently being manufactured. The first completed sections arrived on 26 July 2021. When all parts are ready in late autumn, the complete assembly will follow so that the ASTRA Bridge can be tested as a whole.

It will then go into use in spring 2022, when surface replacement is planned as a pilot project on the A1 section between Recherswil and Luterbach.