13.3. Stopping Sight Distance

Try these first

1. 1.

   Define Stopping Sight Distance.

   Hint

   Focus on the definition related to stopping.

2. 2.

   What does lag distance represent?

   Hint

   Think about the time it takes before action is taken.

3. 3.

   What is the formula for calculating Stopping Sight Distance?

   • SSD = vt + (v^2/2gf)
   • SSD = vt - (v^2/2gf)
   • SSD = v^2 + gt

   Hint

   Remember the components of the distance involved.

4. 4.

   True or False: Higher speeds require longer stopping sight distances.

   • True
   • False

   Hint

   Consider the energy related to speed.

5. 5.

   Calculate the SSD for a vehicle traveling at 90 km/h with a braking efficiency of 40% on a flat road.

   Hint

   Focus on converting the speed before applying the formula.

6. 6.

   A vehicle is on a 5% downhill gradient at 70 km/h. Determine the SSD required factoring in the increased distance due to gravity.

   Hint

   Use the effects of gravity in your calculations.