Sub-problem 3a: Weaving Analysis
Another interesting observation occurs at Location B during the PM peak. The weave has a LOS B. Although the weave has adequate performance levels, a traffic signal located at the eastern end of Rte. 7 eastbound often creates long queues coming out of the weaving section. The queues are not caused by the weave, but do cause an impact in the way the weave operates.
 Exhibit 2a-1. Weave C PM peak hour volumes |
Weaving Segment C. The weave at location C is comprised of I-787 northbound, the 23rd Street northbound on-ramp and the Rte. 7 eastbound off-ramp. This weave is a fairly conventional Type C weave. It has a length of approximately 1,000 ft. There is single lane on-ramp at 23rd Street and a double lane off-ramp exiting to Rte. 7 eastbound.
We can use this weaving section to examine the effects that the flow distributions have on a weave’s performance. The PM peak hour volumes are heavier, so those will be used for the analysis. The PM peak hour volumes for traffic entering and exiting the weave are shown in Exhibit 1. The exhibit does not define the distribution of flows through the weaving segment. Let’s look at a three different scenarios.