Sub-problem 3a: Weaving Analysis
Considering the poor operations at this facility it would be interesting to look at the effects that different geometric conditions would have on it operation. Let’s take the point of view, "we can start all over again". We’ll focus on two main ideas: increased length and additional lanes.
First, consider the question what effect does the weaving length have on the segments operations during the PM peak hour? The existing weave is 792ft in length. In order to observe the effects of the lengths, we’ll perform additional analyses for lengths of 1,000 ft to 2,500 ft. (Note 2,500ft is HCM’s the upper bound for the length of a weaving segment.) The results each of these analyses are shown in Table 2a-5. The results show that a minor increase in the weave length (approximately 200 ft) will bring the LOS from F to E. The second next step is quite a bit larger (around 1,500 ft); from LOS E to D.
| Table 5. Effects of Weave Length at Location E | ||||||||
| Weave Length | Ww | Wnw | Sw mph | Snw mph | S mph | Density pcpmpl | LOS | Operation of Type |
| 792 | 4.61 | 0.88 | 23.02 | 38.97 | 27.87 | 44.99 | F | Constrained |
| 1,000 | 3.83 | 0.74 | 24.32 | 40.91 | 29.39 | 42.67 | E | Constrained |
| 1,500 | 2.77 | 0.54 | 26.94 | 44.15 | 32.30 | 38.82 | E | Constrained |
| 2,000 | 2.20 | 0.44 | 29.07 | 46.29 | 34.54 | 36.31 | E | Constrained |
| 2,500 | 1.84 | 0.37 | 30.85 | 47.83 | 36.34 | 34.51 | D | Constrained |