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Sub-problem 4d - Page 1 of 3

ID# C104D01

Sub-problem 4d: Coordinated Operation With Left-Turn Protection

An issue that commonly arises when actuated controllers are used within a coordinated system is whether or not to provide protected phasing to the major street left-turn movements. This issue is appropriate to address for the proposed new signal at the Styner-Lauder intersection.

In sub-problem 4d, we will demonstrate how to address this question at the U.S. 95/Styner-Lauder Avenue intersection.  Here are some issues to consider as you prepare to conduct this analysis:

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Do existing or projected volumes warrant protected left-turn phasing at this intersection?

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How is the green time allocated between the through and left-turning phases on the major street?

bulletWhat are the delay implications of providing protected left-turn phasing on the major street?

Discussion:
Take a few minutes to consider these questions.  Click continue when you are ready to proceed.

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