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> Sub-problem 6d - page 2 of 2 Sub-problem 6d: Planning Analysis at SH-8 Intersection The twenty-year projected volumes for this intersection, adjusted for the peak period factor are shown in Exhibit 1-53.
This is an unusual intersection that will require careful thought before applying the quick estimation method. As indicated in Exhibit 1-54, The eastbound approach is one-way towards the intersection. The departure roadway to the north is one-way away from the intersection. Therefore, there is no westbound through movement, no northbound left turn, and no southbound traffic at all. The phasing is as shown in the diagram here. Exhibit 1-54. SH-8 Phase Diagram So, the first thing to consider is the type of treatment (permitted, protected, protected plus permitted or not opposed) to specify for each of the left turns. Since the eastbound and westbound movements are fully separated, the not opposed treatment will apply. While the northbound and southbound left turns do not exist, they must be specified as permitted because of the way that the quick estimation method represents traffic movements. For more detail on this subject, see the discussion presented under sub-problem 6c. |
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