42.6 - Problems
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Practice Questions
Test your understanding with targeted questions
What is the lost time per phase?
💡 Hint: Refer to the data provided in the problem.
Define cycle length.
💡 Hint: Think about what 'complete' means in this context.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does the term 'cycle length' refer to?
💡 Hint: Consider all phases involved in a signal operation.
True or False: Lost time affects the actual green time available.
💡 Hint: Think about how signals operate during transitions.
1 more question available
Challenge Problems
Push your limits with advanced challenges
A four-legged intersection with different flows of traffic needs to determine an efficient cycle length. If traffic is consistently high and flows are 800 vph (North-South) and 600 vph (East-West), what would be the optimal cycle length considering a lost time of 2.5 seconds and a V/C ratio of 0.9?
💡 Hint: Mind the saturation flow and adjust your calculations accordingly.
With given traffic flows of 750 vph (North-South) and 500 vph (East-West), what would the total delay be for one full cycle if the effective green time allocated is 18 seconds?
💡 Hint: Focus on which values are needed from the relationships outlined with Webster’s Delay formula.
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