Assertion (A): Transition curves are not required when the radius of the horizontal curve is very large. Reason (R): For large radius curves, centrifugal force is small and hence lateral jerk is negligible.

A horizontal curve is designed such that the available stopping sight distance equals the required SSD. If the speed of vehicles increases slightly above design speed, which failure is expected first?

The length of a transition curve is designed based on the rate of change of centrifugal acceleration. If design speed is doubled, transition length (keeping other factors same) should ideally:

For a summit curve designed exactly for stopping sight distance, if driver eye height is reduced, the required curve length will:

In valley curve design at night, increasing headlight height while keeping beam angle constant will:

For a fixed stopping sight distance, the lateral clearance required on a horizontal curve is maximum when:

A curve satisfies: Superelevation limit, Side friction limit AND Transition curve length. But accidents still occur frequently. Most likely missing design check is:

On a two-lane undivided highway designed as per IRC standards, a horizontal curve of radius R is provided with a roadside obstruction on the inner side of the curve. The stopping sight distance (SSD) requirement governs the design. Which of the following statements is most technically correct?

A horizontal curve is designed without superelevation on a low-speed urban road. The designer relies only on side friction for vehicle stability. Which of the following is the most critical limiting condition?