40.7. Problems

Try these first

1. 1.

   What is the formula for calculating weaving width?

   Hint

   Think about the average of the entry and exit widths.

2. 2.

   Define 'capacity' in the context of a rotary.

   Hint

   Consider the efficiency of vehicle movement.

3. 3.

   What is the main function of a rotary intersection?

   • To allow free flow of traffic
   • To manage traffic movements with minimal conflict
   • To force vehicles to stop

   Hint

   Think about the design principles of a rotary.

4. 4.

   True or False: The weaving length has no impact on rotary capacity.

   • True
   • False

   Hint

   Reflect on how traffic merges in a rotary.

5. 5.

   Given that the rotary's total traffic volume is 3600 veh/hr, and 35% of these are right turns, calculate the effective capacity using an assumed weaving width of 12 m and p = 0.6.

   Hint

   Focus on the proportionate distribution of traffic volumes.

6. 6.

   Analyze how increasing entry width affects overall rotary capacity based on empirical observations. What changes occur in the traffic flow and capacity estimations?

   Hint

   Review the proportional relationship between entry width and capacity.