What is the recommended maximum superelevation rate for highways in flat terrain

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Question: What is the recommended maximum superelevation rate for highways in flat terrain?

Options:

Correct Answer: 6%

Solution:

A maximum superelevation rate of 6% is typically recommended for highways in flat terrain to ensure vehicle stability during turns.

What is the recommended maximum superelevation rate for highways in flat terrain?

What is the recommended maximum superelevation rate for highways in flat terrain?

Step 1: Understand what superelevation means. Superelevation is the banking of a road at a curve to help vehicles turn safely.
Step 2: Know that highways are designed with certain standards for safety and performance.
Step 3: Recognize that in flat terrain, the road does not have natural slopes to help with turning.
Step 4: Learn that a superelevation rate of 6% means the road is tilted at a 6% angle at the curve.
Step 5: Understand that this 6% rate is recommended to keep vehicles stable and prevent them from sliding off the road during turns.

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