Question

For a transition curve, the polar deflection angle ${\alpha }_s$ and the spiral angle ${\Delta }_s$ are related to each other by the expression:

• A. ${\alpha }_s=\frac{{\Delta }_s}{2}$
• B. ${\alpha }_s=\frac{{\Delta }_s}{3}$
• C. ${\alpha }_s=\frac{{\Delta }_s}{4}$
• D. ${\alpha }_s=\left(\frac{{\Delta }_s^2}{3}\right)$

Answer 1

The correct option is B ${\alpha }_s=\frac{{\Delta }_s}{3}$

${\alpha }_s=\frac{{\Delta }_s}{3}$