12.2. Pavement surface characteristics

Try these first

1. 1.

   What is the main purpose of friction in pavement design?

   Hint

   Think about vehicle movement and control.

2. 2.

   What does an unevenness index below 1500 mm/km signify?

   Hint

   Is lower better or worse when measuring unevenness?

3. 3.

   What is one major factor affecting pavement friction?

   • Type of vehicle
   • Road condition
   • Weather only

   Hint

   Think about the surface on which vehicles drive.

4. 4.

   True or False: Uneven pavement can increase vehicle wear.

   • True
   • False

   Hint

   Consider how rough surfaces affect movement.

5. 5.

   Given a road with a friction coefficient of 0.35, calculate the safe speed limit for a vehicle with a maximum deceleration of 4 m/s². Discuss the implications of increasing load on this friction value.

   Hint

   Consider the physics of force and friction in relation to speed.

6. 6.

   Analyze how uneven roads can affect fuel efficiency in vehicles over time. Discuss potential long-term effects on maintenance and safety.

   Hint

   Think about how energy efficiency relates to surface conditions.