For a circular curve of radius 200 m, the coefficient of lateral friction of 0.15 and the design speed is 40 kmph. The equilibrium superelevation (for equal pressure on the inner and outer wheel) would be

For a circular curve of radius 200 m, the coefficient of lateral friction of 0.15 and the design speed is 40 kmph. The equilibrium superelevation (for equal pressure on the inner and outer wheel) would be

• A. 21.3
• B. 7
• C. 6.3
• D. 4.6

 

The correct answer is option C. 6.3. Can you explain this answer in the comments?

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