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Problem 2 - Page 2 of 3 |
ID# C202002 |
Problem 2: Moe Road
The signal phasing is
shown in Exhibit 2-22. There are
three phases: 1) westbound protected left; 2) east-west green with
permitted lefts; and 3) north-south green with permitted lefts.
Exhibit 2-23 shows some
signal timing data collected on a recent weekday morning.
Variations in the platoon arrivals on the
eastbound and westbound approaches make the cycle length fluctuate significantly. Also, as the
data show, the first phase is skipped if neither the eastbound or
westbound left-turn lane is occupied.
Lefts that arrive during Phase 2 can turn permissively.
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Exhibit 2-23. Moe Road/Route 146
Intersection
Timing Data for the AM Peak Hour
|
|
Cycle |
Phase 1 |
Phase 2 |
Phase 3 |
Cycle Length |
|
1 |
9-3-1 |
38-3-1 |
20-3-1 |
79 |
|
2 |
- |
30-3-1 |
31-3-1 |
69 |
|
3 |
7-3-1 |
50-3-1 |
33-3-1 |
102 |
|
4 |
- |
50-3-1 |
29-3-1 |
87 |
|
5 |
12-3-1 |
19-3-1 |
34-3-1 |
77 |
|
6 |
8-3-1 |
49-3-1 |
35-3-1 |
104 |
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*The time read as Green-Yellow-Red
Data Collection Date: Friday - 6/21/2002 |
Analysis
Plans:
Description of Analyses
Sub-problem
2a:
AM Peak Hour - Existing Conditions
Sub-problem
2b:
PM Peak Hour - With Conditions
Discussion
Discussion:
Look
at the photographs of Moe Road shown on the previous page. Are there other pieces of
information about the site that should have been factored into our
characterization of the intersection? Consider intersections that you have
analyzed and ask why pictures are so valuable and why visits to the facility
are important in doing the analysis correctly.[
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