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Exhibit 3-41. Comparison of Traffic-Actuated Timing Plans |
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Method of Determining Average Green Times |
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Optimal Pre-timed Values Used Directly as Average Green Times |
HCM Chapter 16 Appendix B with Max Greens Based on Pre-timed Optimal Values Multiplied by a Factor |
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Factor = 1.0 |
Factor = 1.5 |
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Green Time (sec): |
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WBLT |
9.7 |
10 |
15.0 |
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EB & WB Through |
81.8 |
70.5 |
91.6 |
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NB Through |
10.5 |
11 |
16 |
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Cycle Length |
120 |
109.5 |
140.6 |
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v/c ratio |
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WBLT |
0.84 |
0.74 |
0.63 |
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EB Through |
0.83 |
0.88 |
0.87 |
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NB Through |
0.83 |
0.72 |
0.64 |
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Critical v/c ratio |
0.83 |
0.85 |
0.81 |
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Control Delay (sec/vehicle) |
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WBLT |
88 |
65 |
67 |
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EB Through |
17 |
20 |
24 |
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NB Through |
71 |
55 |
63 |
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Overall Intersection Delay |
23.0 |
23.3 |
26.6 |
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Level of Service |
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WBLT |
F |
E |
E |
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EB Through |
B |
C |
C |
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NB Through |
E |
D |
E |
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Overall Intersection LOS |
C |
C |
C |