An extensive analysis of existing national and international standards and guidelines will be carried out to identify, review and categorise information which is currently available in connection with the parameters associated with the choice of VRS. A data matrix will also be produced outlining, as a minimum, the type of variables (posted speed, AADT, etc) typically used for identifying the need for VRS in existing guidelines, the data available in NRA databases for the analyses and the previous studies linking variables and accident frequency/accident consequences. These variables will then be linked to the potential type and severity of collisions that can arise with a VRS, based on both existing studies and on additional crash data available for the SAVeRS project. Based on this information a practical guidance document and a web-based tool will then be produced which will include also life cycle cost models for VRS applications.

To ensure that the SAVeRS project output will be a useable, robust and realistic guidance tool to aid designers in their choice and selection of VRS, a specific evaluation Task will be performed to test the effectiveness of the guidelines and of the tool developed in the project The guideline and tool will be tested for application to new and current designs and against sites where VRS have been in use for some years and performance information is available.