Practice Quiz

Civil Engineering PE

Category - Transportation

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Why is a correction factor applied to roadway earthwork volume calculations for alignments that include a horizontal curve?
  1. To account for volume of roadway bedding material
  2. To account for soil shrinkage or swell
  3. To account for the eccentricity of the curved area
  4. To provide a factor of safety
Explanation
Answer: C - A correction factor is applied to roadway earthwork volume calculations for alignments that include a horizontal curve to account for the eccentricity of the curved area. The correction factor is applied to volume calculations to compensate for soil shrinkage. The “corrected” volume represents the amount of material in a “natural state” that is required to fill compacted roadway embankments. Additionally, a swell compensation factor may be required if rock or large stones used to construct an embankment.
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