20.2. Traffic and loading

Try these first

1. 1.

   What is contact pressure?

   Hint

   Think about what a tire does when it is on the road.

2. 2.

   How does wheel load affect pavement depth?

   Hint

   Consider the weight of the vehicles.

3. 3.

   What is the primary factor affecting pavement design?

   • Environmental factors
   • Traffic
   • Material properties

   Hint

   Think about what stresses a pavement the most.

4. 4.

   True or False: Higher speeds of moving vehicles decrease the stress and deformation on pavement.

   • True
   • False

   Hint

   Consider how speed and time affect stress.

5. 5.

   Given a truck with a total weight of 40 kN distributed on 4 wheels, calculate the contact pressure if the contact area per wheel is circular with a diameter of 0.6 m.

   Hint

   Remember the contact pressure formula and how to calculate the area of a circle.

6. 6.

   Analyze a scenario where a pavement experiences 10,000 load applications of 80 kN each. Discuss how this may affect the pavement’s longevity, considering the cumulative effect.

   Hint

   Look into how repeated stresses contribute to material fatigue.