Maintenance of Pavement Skid Resistance (Open Graded Asphalt Friction Courses), Progress Report, HR-170, 1976

This project involved the evaluation of several aggregates previously rated poor to excellent with respect to skid resistance and certain mix design parameters. An open graded asphalt friction course was evaluated using 4 comparably graded aggregates: quartzite, fine grained limestone, coarse limestone and lightweight expanded shale. The performance investigations involved the verification of observations of the quartzite test sections, evaluation of the effect of blending the superior quartzite with a typical coarse grained-textured limestone, and the evaluation of the limestone. The effects of traffic on the aggregates used in the test sections were studied, as well as the relationship between asphalt content levels and traffic with respect to performance. The bond of the open graded friction course mixture was also evaluated. The SN performance of all test sections after sixteen months of exposure was found to be satisfactory in that none of the material combinations had polished to the point where unacceptable SN levels developed. When material combinations were compared, significant differences were noted.

Skid Resistance of the Secondary Road System in Iowa, MLR-77-1, 1977

The Iowa Department of Transportation has been conducting skid resistance tests on the paved secondary system on a routine basis since 1973. This report summarizes the data obtained through 1976 on 10,101 miles in 95 of the 99 counties in Iowa. A summary of the skid resistance on the secondary system is presented by pavement type and age. The data indicates that the overall skid resistance on this road system is excellent. Higher traffic roads (over 1000 vehicles per day) have a lower skid resistance than the average of the secondary roads for the same age and pavement type. The use of non-polishing aggregates in asphaltic concrete paving surface courses and transverse grooving of portland cement concrete paving on high traffic roads is recommended. The routine resurvey of skid resistance on the secondary road system on a 5-year interval is probably not economically justified and could be extended to a 10-year interval.

A Laboratory Investigation of An Accelerated Polishing Method for Determining the Skid Resistance Potential of Aggregates, MLR-76-02 and R-264, 1976

An initial feasibility study indicated that the "Purdue Accelerated Polishing Method" gave repeatable results when testing the skid resistance of laboratory specimens. The results also showed a rough correlation with the field performance of the same aggregate sources. The research was then expanded to include all available asphalt aggregates. The results of the expanded study indicated that the method is not presently capable of developing and measuring the full skid potential of the various aggregate sources. Further research in the area of polishing times and/or pressures is needed.

Seasonal skid resistance variations. Final report.

Mode of access: Internet.

Seasonal skid resistance variations. Interim report.

Pennsylvania Department of Transportation, Bureau of Materials, Testing and Research, Harrisburg

Variations in skid resistance over time. Part 1. Final report.

Virginia Department of Highways and Transportation, Richmond

Design prediction of pavement skid resistance from laboratory tests. Final report.

Mode of access: Internet.

Wet weather highway accident analysis and skid resistance data management system. Volume 2: user's manual. Final report.

Louisiana Transportation Research Center, Baton Rouge

Effect of tire wear on skid resistance. Final report.

Federal Highway Administration, Office of Research, Washington, D.C.

New and innovative methods and materials for pavement skid resistance /

Mode of access: Internet.

Effect of tire wear on skid resistance /

Mode of access: Internet.

Manual for the construction and maintenance of skid surfaces corresponding to those prepared by Texas Transportation Institute under National Bureau of Standards contract CST-451. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Improved skid resistant pavements. Demonstration project no. 10. Final report.

Mode of access: Internet.

Effectiveness of alternative skid reduction measures. Volume I: evaluation of accident rate-skid number relationships. Final report.

Federal Highway Administration, Office of Research and Development, Washington, D.C.

Effectiveness of alternative skid reduction measures. Volume II: benefit-cost model. Final report.

Federal Highway Administration, Office of Research and Development, Washington, D.C.