Practice Quiz

Civil Engineering PE

Category - Transportation

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Which of the following impacts would the presence of ice and snow conditions on a superelevated roadway have that influence the maximum useable rate of superelevation?
  1. Cause traffic backups due to slow moving traffic
  2. Cause vehicles to spin
  3. Cause vehicles to slide towards the center of the curve
  4. None of the above
Explanation
Answer: C - The presence of ice and snow conditions on a superelevated roadway may influence the maximum useable rate of superelevation because vehicles could slide towards the center of the curve. In many states that experience cold climate conditions, the maximum rate of superelevation is set to 6 percent. Many roadways with low design speeds (less than 45 miles per hour) are designed without superelevation because of such weather-related concerns.
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