SKID RESISTANCE OF BITUMINOUS SURFACES IN OHIO. ODOT PROJECT 3775. FINAL REPORT

Statistical studies of skid number (sn) on the state highway system in Ohio reveal apparently systematic variations in distributions of sn among the twelve districts in the state. These variations appear to be significantly related to traffic and to geological characteristics of a given district. Regression calculations using traffic index, a function of adt and age of the pavement surface in months, showed a high correlation with sn, although standard errors of estimate were too large to make the equations useful for "predicting" sn from traffic variables. Similar results were obtained by relating sn to physiographic features in the state. Pavement surface type (bituminous or pcc) and coarse aggregate type (limestone, gravel or slag) are significantly related to sn. Further research is recommended to identify aggregate properties pertinent to sn and to investigate the effect of mix design. Several alternative policies are outlined for allocating funds among districts for upgrading sn at potentially hazardous locations, with the objective of equalizing skidding hazard throughout the state. One of the suggested final allocation policies also requires further research. (Author/TRRL)

• Corporate Authors:

  University of Toledo

  Department of Civil Engineering, 2801 West Bancroft Street
  Toledo, OH  United States  43606-3390
• Authors:
  • Colony, D C
• Publication Date: 1984-3

Language

• English

Media Info

• Pagination: 125 p.

Subject/Index Terms

• TRT Terms: Aggregates; Classification; Flexible pavements; Forecasting; Friction; Hazards; High risk locations; Skid resistance; Surfacing
• ITRD Terms: 1663: Accident black spot; 4577: Aggregate; 8513: Classification; 2944: Flexible pavement; 132: Forecast; 5452: Friction; 9150: Risk; 3031: Skid resistance; 2972: Surfacing
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00499359
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: /OH-84
• Files: ITRD, TRIS
• Created Date: Sep 30 1990 12:00AM