Towards contactless skid resistance measurement

Monitoring of skid resistance is an important component of maintaining road networks. Over the past decades a wide range of routine measurement devices has been developed, all of them measuring the friction force between a rubber wheel and the (wetted) road surface. At the same time many efforts have been undertaken on a variety of grounds to predict skid resistance solely from texture measurements. We present a concept of contactless skid resistance measurement which is based on optical texture measurement and consists of two components: measurement of the pavement texture by means of an optical measuring system; and calculation of the skid resistance based on the measured texture by means of a rubber friction model. We describe the basic assumptions underlying the theoretical approach and present the model based on the theory of Persson. Two skid resistance measuring devices are chosen to prove the theoretical approach: one laboratory device called Wehner/Schulze (W/S) machine which corresponds to a blocked-wheel braking test and the ViaFriction device of ViaTech AS which measures the skid resistance under controlled longitudinal slip and corresponds to ABS braking conditions. We describe the measurement devices and experiments conducted. The results are very promising although in the case of the ViaFriction device only a few surfaces could be tested. A close relation between measured and predicted friction coefficients could be found. The 95 % prediction interval is +/- 0.04 and the variance 0.02. Thus, a strong indication could be provided that skid resistance could be measured without contact in the future.

• Record URL:
  • http://saferroadsconference.com/conference-papers-2014/
• Authors:
  • Ueckermann, A
  • Wang, D
• Conference:
  • International Safer Roads Conference, 4th, 2014, Cheltenham, United Kingdom
• Publication Date: 2014-5

Language

• English

Media Info

• Pagination: 26p
• Monograph Title: Safer Roads 2014: 4th International Safer Roads Conference: 18-21 May 2014, Cheltenham, United Kingdom [papers]

Subject/Index Terms

• TRT Terms: Braking; Friction; Highway design; Pavement performance; Skid resistance; Test procedures
• Uncontrolled Terms: Pavement technology
• ATRI Terms: Braking; Friction; Pavement performance; Road design; Skidding resistance; Test method
• Subject Areas: Design; Highways;

Filing Info

• Accession Number: 01540227
• Record Type: Publication
• Source Agency: ARRB
• Files: ATRI
• Created Date: Oct 14 2014 10:41AM