SAFETy

Motorway exits as well as parking lot entrances are critical points in the ASFINAG network with regard to noise protection, clarity and traffic safety. The design of separation-island tips and the lateral road space for access and exit ramps of connection points is problematic due to the limited space available. The Project SAFETy deals with the safety- and noise-optimized equipment of the separation island tip, taking into account the stress field of noise protection and traffic safety.

On the basis of the state-of-the-art analysis (literature research, guideline analysis) and the results of the international survey of 30 questionnaires, road safety investigations and noise measurements were carried out for the ASt Baden, ASt Kottingbrunn and ASt Böheimkirchen. In addition, near-field measurements and boundary element simulations (BEM) were carried out, which provided information about the acoustic influence of the overlapping area of noise barriers in the area of the separation island tip.

In a variant comparison of different arrangements of the noise protection walls in the area of the exits, the increases and decreases of the noise pollution were examined. Within the framework of the traffic safety study, the optimal design of the separation island tip for different types of connection points was developed and presented in a user manual.

Solutions and recommendations for existing separation island tips and new buildings were developed. Measures to increase traffic safety under consideration of noise protection were presented in a user manual. If there are no embankments, noise protection walls, art structures or other objects, a safety zone should be set up in the separation island tip, which offers a roll-out possibility in the event of accidents involving the fall. In the case of noise protection walls in the Separation Island Spitz, the proposed SAFETy measures had to be checked and implemented. The results of SAFETy are to be considered for new regulations.