Ingår i: EPAM 2012: Malmö, Sweden, 5–7 September: 4th European pavement and asset management conference

The Viennese urban motorway A23 is one of the most important roads of the Austrian motorway network (operated by motorway company ASFiNAG) with an AADT of more than 145‘000 vehicles per day. Erected in the years 1970 to 1973, an essential part of this strongly distressed motorway is the “Hanssonkurve” and the tunnel “Laaerberg”, which must be fully reconstructed under traffic within the next 2 years. An intensive planning and design process including cross asset management was carried out as a basis for finding the optimum maintenance strategy for all assets. The different possible technical maintenance alternatives were assessed including performance prediction of safety, comfort and structural related indicators. The requirements for the optimization were on the one hand the application of durable and sustainable maintenance technologies and on the other hand the minimization of all negative effects to user, neighbours, environment, etc. The goal of the “top-down – bottom-up process” was a combination of pre-defined strategic targets with the maintenance needs of all assets, derived from the technical assessment processes using e.g. life-cycle-cost analysis. The great challenge for the planning and management team of ASFiNAG was the requirement to pass 145'000 vehicles per day through the construction site and the tunnel without major disturbances for the road users and the insert of slipform pavers for a high quality of the new cement concrete pavement. Based on a special traffic concept it was decided that the main work will be carried out mostly during night. The A23 pavement reconstruction of “Hanssonkurve“ is an excellent example how integrated life-cycle-analysis and cross asset management can be used within a user-oriented road maintenance approach in practice. In October 2012 the reconstruction will be finished completely.