A 4000-lb load is placed on two tires, which are then locked in place. A force of 2100 lb is necessary to cause the trailer to move at a speed of 20 mi/h. Determine the value of the skid number. If treaded tires were used, characterize the pavement type.
What will be an ideal response?
First, calculate the skid number using Equations 21.2 and 21.3,
SK = 100 × (L / N)
SK = 100 × (2100 / 4000) = 52.5
Therefore, the skid number would be 52.5. Based on the skid number determined
above and Figure 21.13, the pavement can be characterized as having a surface type
(5), coarse-textured and gritty.
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