ROMA: State assessment of road markings in Denmark, Norway and Sweden - Results from 2017

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Sven-Olof Lundkvist
Berne Nielsen
Trond Cato Johansen
Christian Nilsson

Assessment of the performance of road markings are carried out regularly to various degrees in the Nordic countries. During the coming years, the Nordic certification system for road marking materials will come into force, which means that a documented product approval (i.e. certification) will be required for use of the material on roads managed by the national road authorities. The requirements are introduced successively as the existing contracts expire. The aim of this project is to monitor and follow up how road marking quality is influenced by the introduction of the certification system in Denmark, Norway and Sweden. If the performance does not develop as expected, continuous assessments give the opportunity to react and adjust the requirements in the future. Furthermore, the aim is to show possible differences in road marking performance between the three countries, similar regions in the three countries and TEN-T-roads.

The study is based on mobile road assessment measurements carried out in Denmark, Norway and Sweden by Ramböll AB. In total 71 road objects were measured in Denmark, 101 in Norway and 436 in Sweden. The following variables were studied: retroreflectivity of dry and wet road markings, relative visibility of dry and wet road markings, relative pre-view-time (pvt) of dry and wet road markings and cover index.

In conclusion, there is no large difference in road marking performance in the three countries. The only significant difference is the poor visibility of edge lines on two-lane roads in Sweden and the good performance of wet road markings in Norway.

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