SAE 2016-01-1568 : 2016

Friction on Polished vs. Newly Re-Rocked Oil-and-Chip Roadway Surfaces

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Roadway tractive capabilities are an important factor in accident reconstruction. In the absence of full-scale experiments, tire/road coefficient of friction values are sometimes quoted from reference textbooks. For the various types of road construction, the values are given only in the form of a wide range. One common roadway type is oil-and-chip construction. We examine stopping distances for newly-rocked oil-and-chip roads vs. similarly constructed roads that have been traffic-polished. The examination was conducted through full-scale braking experiments with instrumented vehicles. Results show that the differences between newly-rocked oil-and-chip roads when compared to roads that are traffic-polished are on the same order as vehicle, tire and ABS algorithm differences, and that full-scale testing is required for accurate μ-values.

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Document No: SAE 2016-01-1568 : 2016

Document Year: 2016

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SAE 2016-01-1568 : 2016

SAE 2016-01-1568 : 2016

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