Final answer:
The question involves engineering concepts to calculate road design parameters, such as absolute minimum sight distance, superelevation, extra widening, and length of the transition curve for a highway with a design speed of 100 km/h. These parameters ensure safety and efficiency on curved sections of the road.
Step-by-step explanation:
The question involves calculating various parameters for a national highway design for a specified design speed. It requires understanding the principles of transportation engineering and highway design, including concepts such as sight distance, superelevation, extra widening, and transition curves. Since the exact ruling minimum radius is not provided, assumptions must be made based on standard design values.
To calculate the absolute minimum sight distance, one could apply the formula which considers both the braking distance and the distance covered while the driver perceives the need to stop. For a design speed of 100 km/h, the formula would involve the design speed and a coefficient of friction. The superelevation can be found using the formula that relates speed, radius of the curve, and the gravitational force, helping to determine the banking angle needed to counteract the centripetal force.