This project is carried out in order to determine the risk of aquaplaning on federal highways in Germany. The aims of the project are to describe the influence of climate change on frequency and regional allocation of heavy rainfall events and to identify the road sections in the German highway network which are particularly affected by these precipitation events.
On behalf of the German Federal Highway Research Institute a research project for determining the risk of aquaplaning on federal highways in Germany is carried out at the University of Applied Sciences Gießen-Friedberg, Faculty of Civil Engineering, Department for Road Design and Surveying. Head of department and project leader is Prof. Dr.-Ing. Andreas Bark.
Aims of the project are to describe the influence of climate change on frequency and regional allocation of heavy rainfall events and to identify the road sections in the German highway network which are particularly affected by these precipitation events.
Coming from this, the risk of aquaplaning on highway sections with poor drainage (especially in superelevation development sections) will be determined. Finally recommendations to reduce the risk of aquaplaning will be derived.
In the following intermediate results and further work steps are given:
- The quantity of days per year exceeding the rainfall intensities of i = 10 mm/h and i = 20 mm/h will increase significantly until the end of the 21st century.
- Some regions in Germany can be identified, which are particularly affected by those heavy precipitation events.
- Most of these regions, like the Black Forest, the Ruhr and the Alps, will suffer more heavy rainfall events than they already do today.
- Other regions, like the Thuringian Forest, are expected to become further areas of heavy precipitation in long-term consideration.
- For the affected regions highway sections with potentially poor drainage conditions (superelevation development sections) will be detected.
- Expected aquaplaning speeds for these road sections will be calculated by means of numerical computer simulation with the software PLANUS.
- Based on these results the increase of aquaplaning risk will be determined.
- Recommendations to reduce water film thickness will be derived taking into account alternative methods and constructions.