28.6. Design Traffic

Try these first

1. 1.

   What does CVPD stand for?

   Hint

   Think about how we measure traffic for pavement design.

2. 2.

   What growth rate is often used if specific traffic data is unavailable?

   Hint

   It's a standard percentage!

3. 3.

   What does CVPD measure?

   • Cars per day
   • Commercial Vehicles per Day
   • Bicycles per day

   Hint

   Think about which types of vehicles are most damaging to roads.

4. 4.

   Is the standard growth rate adopted for traffic design often variable?

   • True
   • False

   Hint

   Remember if we always stick to a conventional percentage.

5. 5.

   Design a new four-lane highway segment projected to carry an initial traffic of 1200 CVPD. If the expected traffic growth is 6% annually over a 20-year design life, calculate the cumulative standard axles using a VDF of 2.0.

   Hint

   Make sure to apply the growth formula correctly!

6. 6.

   You discovered discrepancies in reported traffic counts on a major arterial road. Discuss why these differences could lead to problems in pavement design.

   Hint

   Focus on how miscalculations impact durability and safety.