Question

The maximum speed on a BG main track if 100 kmph. The track meets a circular curve of radius 275m. The super elevation to be provided is (in cm).

• A. 40.49

Answer 1

The correct option is A 40.49
Super elevation required for maximum speed

$=\frac{G{V}^2}{127R}=\frac{1.676\times {100}^2}{127\times 275}=0.4799m=47.99cm$

Cant deficiency for BG tracks = 7.5 cm

Actual cant = 47.99-7.5= 40.49 cm