31.9. Problems

Try these first

1. 1.

   Calculate time mean speed given speeds: 30, 25, 35.

   Hint

   Use the average formula.

2. 2.

   What is the formula for space mean speed?

   Hint

   Consider recaps of previous topics.

3. 3.

   What is time mean speed?

   Hint

   Focus on the definition related to time and average.

4. 4.

   True or False: Space mean speed is always less than or equal to time mean speed.

   • True
   • False

   Hint

   Think about how speeds change with traffic.

5. 5.

   A study records 100 vehicles with speeds of 20, 40, 80 km/h. Analyze the variations and calculate both mean speeds and their difference.

   Hint

   Apply the foundational mean speed equations.

6. 6.

   In a longitudinal traffic study, data indicates flow of 150 vehicles/hour and density of 30 vehicles/km. Calculate space mean speed and infer from flow-dense characteristics.

   Hint

   Use relationships in traffic engineering to explain observations.