13.1. Overview

Try these first

1. 1.

   What is stopping sight distance?

   Hint

   It involves both lag distance and braking distance.

2. 2.

   Why is sight distance important in road design?

   Hint

   Think about the relationship between visibility and safety.

3. 3.

   What does SSD stand for in traffic engineering?

   • Safe Sight Distance
   • Stopping Sight Distance
   • Sight Distance Safety

   Hint

   Consider the relationship of stopping to road safety.

4. 4.

   True or False: Higher speeds decrease stopping sight distance.

   • True
   • False

   Hint

   Higher speeds imply longer stopping times.

5. 5.

   Given a vehicle traveling at 60 km/h and a friction coefficient of 0.35 on a flat road, calculate the stopping sight distance.

   Hint

   Use the formula correctly and ensure units are consistent.

6. 6.

   A driver descends a 5% gradient and needs to calculate the stopping distance at 80 km/h with a friction coefficient of 0.4. Calculate the SSD.

   Hint

   Consider how gradient affects stopping distance calculations.