Measurement of Macrotexture on Surface Treatments and Survey of Bicyclist Ride Quality on Mon-198 and SLO-1 Test Sections

Macrotexture was measured on a set of Caltrans pavement surface treatments on test sections in Monterey and San Luis Obispo counties. Bicycle vibration measurements were also taken and a survey of bicyclists ride quality on a subset of those sections was conducted. Macrotexture was measured in terms of mean profile depth (MPD). Three different test methods were used to measure MPD: the sand patch method, the laser texture scanner (LTS), and the inertial profiler (IP). Correlations between bicycle vibration and MPD are shown, and between MPD, bicycle vibration, and bicyclist perception of ride quality and acceptability for use by bicycles. Recommendations are made regarding the use of additional rolling to reduce the texture of chip seals.

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