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Sub-problem 3a - Page 9 of 12 Sub-problem 3a: Weaving Analysis This weaving section is a good place to examine the effects of varying the time period for the analysis. The PM peak hour volumes are more than twice the AM peak hour volumes (see Datasets XX & XX). The results of operational analyses for the AM and PM peaks are presented in Table 2a-3.
The operation of the weave during the AM peak is LOS B and during the PM peak it is LOS F. We should note that in these situations, the HCM suggests that the maximum volume ratio (VR) should be 0.45, and in both cases, this value is exceeded. This suggests that the segment may not be operating well, and some local queuing may be expected. The LOS F that is predicted in the PM peak analysis seems to match the performance observed in the field. During the PM peak, high volumes move through this short weaving section and often cause operational failure. In order to consider the effect that peak hour factors and free flow speeds have on the weave performance, let’s perform a parametric analysis on the weave at Location E. For these analysis we will examine the PM peak hour and consider a variation of the peak hour factor from 0.8 to 1.0 with free flow speeds of 55 mph and 65 mph. |
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