01150974

Component

https://doi.org/10.3141/2155-13

http://scholar.google.com...jafi&publication_year=2010

Locked-wheel trailers are the predominant friction-testing tool used by state departments of transportation in the United States. These trailers measure friction on a locked wheel on the wetted pavement surface as the wheel slides at a constant speed. The skid resistance is reported as the skid number (SN) at the speed it was measured, with the standard test speed at 40 mph. Speed on most rural interstate and primary roads is rarely lower than 65 mph, whereas in most urban environments, congestion, intersections, and high-traffic volumes can lead to average traffic speeds as low as 20 mph. A methodology was proposed to convert the skid numbers from one speed to any desired speed by using adjustment factors. The data used to develop this methodology came from measurements taken by members of the Pavement Surface Properties Consortium for the three consecutive years from 2007 to 2009. The adjustment factors were developed for the different flexible and continuously reinforced concrete pavement surfaces that are available at the Virginia Smart Road. The friction measurements performed with the skid testers presented different responses to the different pavement surface types. To separate them, principal component analysis was used, and three different groups of surfaces were identified. Principal component analysis was also used to develop a friction conversion method that used correlations between speed and texture. Correlations between speed factors and macrotexture were computed only for smooth tire skid testers, because ribbed tires do not exhibit good relationships, probably because measurements with this tire are not sensitive to macrotexture.

01170024

10-2333

English

pp 117-123

2010

Transportation Research Record: Journal of the Transportation Research Board

9780309142854

Print

Figures (5) ; References (6) ; Tables (3)

Adjustment factors; Continuously reinforced concrete pavements; Flexible pavements; Friction; Macrotexture; Skid resistance; Skid trailers; Speed; Texture

Virginia Smart Road

Skid number; Smooth tires; Test speed

Highways; Pavements; I23: Properties of Road Surfaces

PRP, TRIS, TRB, ATRI

Jan 25 2010 11:05AM

• Alternative Validation Practice of an Automated Faulting Measurement Method
• Assessment of Fracture Parameters to Predict Field Cracking Performance of Cold In-Place Recycling Mixtures
• Bonded Whitetopping Overlay Design Considerations for Prevention of Reflection Cracking, Joint Sealing, and the Use of Dowel Bars
• Calibration of HDM-4 Models for Estimating the Effect of Pavement Roughness on Fuel Consumption for U. S. Conditions
• Evaluation of the Speed Constant and Its Effect on the Calibration of Friction-Measuring Devices
• Expedient Spall Repair Methods and Equipment for Airfield Pavements
• Experimental Short-Wavelength Surface Textures in Portland Cement Concrete Pavements
• Full-Scale Field Testing for Injected Foam Stabilization of Portland Cement Concrete Repairs
• Impact of Wide-Base Single Tires on Pavement Damage
• Measuring Friction of Patterned and Textured Pavements: A Comparative Study
• Mechanistic Interpretation of Braking Distance Specifications and Pavement Friction Requirements
• Network-Level Pavement Roughness Prediction Model for Rehabilitation Recommendations
• Performance of Recycled Hot-Mix Asphalt Overlays in Rehabilitation of Flexible Pavements
• Prediction of Reflection Cracking in Hot-Mix Asphalt Overlays
• Reflection Cracking–Based Asphalt Overlay Thickness Design and Analysis Tool
• Relative Effectiveness of Grooves in Tire and Pavement for Reducing Vehicle Hydroplaning Risk
• Three-Dimensional Finite Element Modeling of Static Tire–Pavement Interaction