การวิเคราะห์ความสัมพันธ์ระหว่างค่าความเสียดทานและความลึกโพรไฟล์เฉลี่ยของผิวทางเพื่อสนับสนุนการวางแผนงานบำรุงทาง / นันทวัฒน์ ลือสิงหนาท = Analysis of relationship between pavement friction and mean profile depth to support pavement maintenance planning / Nuntawat Lersinghanart
Pavement friction is an important factor that can help reduce road accident, especially on wet pavement. However, current methods of measuring pavement friction directly take long time and high cost. As a result, pavement maintenance planning in Thailand has usually ignored such factor. The objective of this research is to find the relationship between coefficient of pavement friction (µ) and Mean Profile Depth (MPD) in order to apply MPD as a surrogate factor to evaluate pavement friction at a network level. Since MPD can be measured faster and more cost-effective than pavement friction direct measurement, it can be used to screen pavements that need further detailed investigation. Based on correlation analysis between MPD and coefficient of pavement friction (µ) of 113 samples from field data and 722 samples from historical maintenance database, it is found that if MPDs are higher than 1.5 millimetres, all coefficients of pavement friction (µ) would be higher than the required investigatory level at 0.35. Therefore, MPD can be used as a threshold to reduce needs of direct friction measurement of all pavements, especially at the investigatory level. Furthermore, this research has proposed road safety enhancement framework based on pavement friction monitoring. The thresholds for taking action at either investigatory level or intervention level can be considered based on MPDs and accident data which are resulted from pavement friction. This proposed framework can save cost and time of data collection for pavement friction management at a network level.
