Minimum length of a transition curve required for

• A. 2 curves for a maximum permissible speed of 135 km/hr, is 220 metres
• B. 4 curves for a maximum permissible speed of 95 km/hr, is 220 metres
• C. 6 curves for a maximum permissible speed of 80 km/hr, is 220 metres
• D. All the above.