13. Sight Distance

Try these first

1. 1.

   What is the stopping sight distance (SSD) for a vehicle traveling at 30 km/h with a reaction time of 1.5 seconds?

   Hint

   Consider converting km/h to m/s for your calculations.

2. 2.

   Define overtaking sight distance (OSD).

   Hint

   Think about the space required to maneuver without opposing traffic hazards.

3. 3.

   What is the stopping sight distance for a vehicle traveling at 60 km/h under normal conditions?

   • 55 m
   • 82 m
   • 95 m

   Hint

   Consider the relationship between speed and the required stopping distance.

4. 4.

   True or False: Overtaking sight distance is less significant than stopping sight distance in road design.

   • True
   • False

   Hint

   Think about the importance of visibility when overtaking another vehicle.

5. 5.

   Calculate the SSD for a vehicle going up a gradient of 5% at 70 km/h. Include considerations for reduction in distance due to gradient.

   Hint

   Consider how the upward slope aids braking distance.

6. 6.

   You are designing a road where vehicles will often reach 90 km/h, what would you recommend for the OSD based on current standards? Provide reasoning for your decision.

   Hint

   Look into recommended distances for overtaking safely at high speeds.