Determination of the threshold level of skid resistance of pavements

Threshold level of skid resistance is a process that is widely used in the pavement management to minimize the measured skid resistance at standard level for activating the maintenance of each section of the pavement with less skid resistance than this threshold. Road accidents during wet weather are a major concern for road engineers in rainy season. Road safety studies show that about 20% of all road accidents occur during wet weather, and resistance to wet roads has a major impact on wet weather accidents. Due to the lack of predictability of the ability to withstand skidng levels under different rainfall patterns, a minimum slip resistance threshold for safe driving in wet climates should be considered. In our country, these thresholds and management methods have not yet been defined. Monitoring the slip resistance of pavement surfaces is an integral part of a typical pavement management system. This paper shows how, using a scientific approach, the minimum threshold of skid resistance in different points of a road network is determined using different methods in the world that have been used so far. It is worth noting that other advanced methods are also used in different countries that are not addressed in this article.