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→Additional Work:
==Additional Work:==
==Additional Work:==
[[File:Measuring friction LSRCA office.png|thumb|600px|This image demonstrates the two extremes of LSRCA’s friction testing: a perfectly clear and dry surface, with a µ value of 0.9 and the same surface covered in a light layer of snow, with a µ of only 0.11.]]
===Parking Lot Friction Testing===
===Parking Lot Friction Testing===
Two of the main considerations contractors face in maintaining parking lots in winter are: what application rate should be used; and what is the level of service expected by the property owner, for which the bare pavement return time is a common measure (this is the amount of time it takes after treatment to achieve a bare surface). To better understand these questions in 2017 the LSRCA obtained a friction tester, with a goal of quantifying the effectiveness of various practices and salt application rates. Here we present some of the findings of this study.
Two of the main considerations contractors face in maintaining parking lots in winter are: what application rate should be used; and what is the level of service expected by the property owner, for which the bare pavement return time is a common measure (this is the amount of time it takes after treatment to achieve a bare surface). To better understand these questions in 2017 the LSRCA obtained a friction tester, with a goal of quantifying the effectiveness of various practices and salt application rates. Here we present some of the findings of this study.
As can be seen in the inset table, the unit for measuring friction is ‘µ’, and the closer to 1.00 the µ value, the safer the surface. A high µ, however, is not the only measure of safety – many smooth indoor floors will have low µ values, in the range of 0.3 to 0.4, and they are generally not considered unsafe. Through this study, we measured the friction of several different surfaces, which received varying treatments.
As can be seen in the inset table, the unit for measuring friction is ‘µ’, and the closer to 1.00 the µ value, the safer the surface. A high µ, however, is not the only measure of safety – many smooth indoor floors will have low µ values, in the range of 0.3 to 0.4, and they are generally not considered unsafe. Through this study, we measured the friction of several different surfaces, which received varying treatments. <br>
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{|class="wikitable"
{|class="wikitable"
|+Friction Values and Related Road Surface Conditions
|+Friction Values and Related Road Surface Conditions