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Rankers description
 
 
RANKERS proposes to address traditional passive safety measures ("forgiving roads") together with a better understanding of the accident causation scenarios, leading to a significant mitigation of the risks posed by the road and its environment. The roads design should be directly focused to the concept of making "self-explaining roads", that is to say, advocating a traffic environment which elicits safe driving behaviour simply by its design so that the road user is neither confused nor invited to take risks.

The project has produced two main results, in line with an integrated approach for road infrastructure safety: the eBook – Ranking of Recommendations and the Road Safety Index

The Road Safety Index is a methodology for the evaluation of road safety in road sections. It assesses the actual status of road infrastructure and its relationship with road safety. The main innovative aspects of this index are as follows:

  • It is divided in six infrastructure topics: road alignment, junctions, overtaking, roadside, pavement and road layout consistency. This allows identifying the specific aspects where safety can be improved in road sections.

RSI road infrastructure topics
RSI road infrastructure topics

  • It provides safety marks for the different infrastructure topics each 1,5 – 2 km. This means that within a road network the potential users can identify the road sections where each infrastructure category should be improved.

  • Safety marks are divided in four categories:
       1. It is urgent to take remedial measures to solve this infrastructure safety topic.
       2. There are deficiencies to be solved in a medium term period.
       3. No need of action if maintenance is kept properly.
       4. No action is necessary. Therefore, the road networks administrators can prioritize the road infrastructure investments in those sections where they are most necessary. This can be easily showed with the colour evaluation scale.  

Therefore, the road networks administrators can prioritize the road infrastructure investments in those sections where they are most necessary. This can be easily showed with the colour evaluation scale.

RSI colour evaluation scale
RSI colour evaluation scale

  • The index therefore provides a general safety mark for each road section and six particular road safety mark for each category in each road section. 

Road section evaluation results example
Road section evaluation results example

This can result in a colour map with the evaluation of a whole road network.

Example of the evaluation results after applying the RSI to a set of roads
Example of the evaluation results after applying the RSI to a set of roads



After having identified the road safety deficiencies of road infrastructure, the eBook - Ranking of Recommendations offer the most cost - effective solutions for the above problems. WP4 produced a list of remedial countermeasures, according to different accident scenarios, that are tanked according to the relationship between their costs (installation and maintenance) and their effectiveness reducing the number of accidents or their severity.

Then, this catalogue was integrated in the interactive tool eBook developed within WP3. Therefore, this catalogue is available on the internet for all the stakeholders involved in the road infrastructure sector, mainly road operators, administrators and road safety experts. The main innovations that this interactive tool offers are the following:

  • The catalogue is structured according to different accident scenarios developed through the course of the project. Therefore, it can provide the adequate solutions for different road safety problems.

  • The countermeasures included in the catalogue are ranked according the ratio between their costs and effectiveness. As the effectiveness information is not always available, the project has developed a methodology that allows calculating the ratios between the countermeasures of the same scenario. It does not provide absolute ratios but within a set of countermeasures it provides which are more cost - effective compared to the other ones.

  • The calculations can be reformulated if updated information is available for the potential future users regarding the costs in the specific regions where it would be applied.

The eBoos allows the users searching within the scenarios according to relevant keywords (i.e. type of collision, road users involved, environment, weather conditions...). Therefore, this facilitates the process of finding the most appropriate countermeasure for the problem under analysis. The consortium recommends not to use this tool as a unique platform. When improving road safety in a rod section, this must be inspected, previous accident data should be also considered and regional or national regulation restrictions should also be considered. The eBook should just be a guide for finding the best solution.