Evaluation of road restraint systems in central reserve (VSS2005/201)
Overview
Background & policy context:
Based on a detailed analysis and considering foreign studies on this issue, the roadway sections it is needed to assess subdividing of road restraint systems into the conventional systems according to the ASTRA guidelines, concrete barriers and steel barriers.
Objectives:
The objective of this research project is the evaluation of the common safety barriers (road restraint systems) used in general in central reserves of Swiss motorways with regard to the criteria's traffic safety, maintenance and requirements of the norms and guidelines.
The research work gives basics for an entire assessment of road restraint systems which are used in the central reserve of Swiss highways. Decisive matrixes for the use of different systems (safety barriers according to ASTRA guideline, steel barriers and concrete barriers) will be evaluated considering safety, constructional and internal/financial criteria's. In addition to the norm SN 640 561 and guidelines these matrixes shall help the project planner to decide on a system.
Methodology:
The project was developed during the following Phases:
- Phase I: identifying those to be examined sections, of existing systems, route characteristics, procurement of accidents and maintenance specifications.
- Phase II: Evaluation and assessment of the data in the form of an interim report
- Phase III: Comparison with foreign studies (D and F), provide decision matrices and checklists
- Phase IV: Preparation of the final report
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