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.