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3 cards from this section. Quick, good the night before a test.
Define design speed in the context of traffic rotaries.
Think about safety in vehicle movement.
What is the purpose of the exit radius?
Consider how vehicles transition out of the rotary.
What is the typical design speed for urban rotaries?
Refer to speed limits generally associated with busy areas.
True or False: The exit radius should be equal to or less than the entry radius in a rotary design.
Think about vehicle transition speeds.
A rotary has an entry radius of 10m. If the exit radius is 1.5 times this entry radius, what should the exit radius be?
Multiply the entry radius by 1.5.
Discuss the implications of having a very small weaving length at a rotary. How might it affect traffic safety and flow?
Consider what happens when vehicles are too close together.
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