20.2.3. Axle configuration

Try these first

1. 1.

   Describe the impact of more axles on pavement stress.

   Hint

   Think about how weight is spread across the pavement when more wheels are present.

2. 2.

   What is contact pressure?

   Hint

   Consider how wheel load affects the pavement directly.

3. 3.

   What is the primary benefit of having multiple axles on a vehicle in terms of pavement design?

   • Increased speed
   • Better load distribution
   • Higher contact pressure

   Hint

   Consider how weight translates into pressure on single vs. multiple points.

4. 4.

   True or False: Contact pressure increases as the number of axles decreases.

   • True
   • False

   Hint

   Think about how weight is applied to a smaller area with fewer wheels.

5. 5.

   A delivery truck with a single rear axle often causes damage to neighborhood streets. Propose a redesign of the truck's axle configuration to minimize pavement impact.

   Hint

   Consider the distribution of weight as you change the configuration.

6. 6.

   Evaluate the potential reduction in pavement lifespan when subjected to a constant cumulative load over time. What could be implemented to mitigate this risk?

   Hint

   Think about how materials can interact with loads over time.