Civil Engineering PE

Category - Transportation

When designing the alignment of a roadway, which of the following factors is a general consideration in obtaining the proper mix of horizontal and vertical curves in the final design?
  1. Design speeds should be appropriate with the local topography
  2. Alignment should be as flat as possible near intersections
  3. For two-lane rural highways, adequate safe passing sections should be incorporated at frequent intervals
  4. All of the above
Explanation
Answer: D - All of the listed factors are considered in obtaining the proper mix of horizontal and vertical curves in the final alignment design of a roadway. Because of the magnitude of effort put into constructing a roadway, alignments must take important factors such as these under consideration during the design phase. Other factors that play a role in the final alignment include existing and future land development, subsurface conditions, and political interests.
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