Correct Answer - Option 2 : More
Explanation:
Stopping sight distance:
(i) Stopping sight distance is the minimum distance over which the driver traveling at design speed can apply brakes and bring the vehicle to stop position safely without collision with any other obstruction.
(ii) It is also known as minimum sight distance or non-passing sight distance. Stopping sight distance should be provided throughout the length of all roads.
Stopping sight distance (SSD) = lag distance + Braking distance
\(SSD = vt + \frac{{{v^2}}}{{2gf}}\)
Effects of Ascending gradient on SSD: Suppose Ascending gradient = n%
\(SSD = vt + \frac{{{v^2}}}{{2g\left( {f\; + \;0.01n} \right)}}\)
Effects of Descending gradient on SSD: Suppose Descending gradient = n%
\(SSD = vt + \frac{{{v^2}}}{{2g\left( {f\; - \;0.01n} \right)}}\)
So from the above two concepts, it is clear that on the descending gradient, the SSD required is more as Denominator will be less in case of Descending gradient.
