Exhibit 4-22. Weave C Weave C is formed by the I-87 southbound frontage road and the semi-direct ramp from westbound Alternate Route 7. The I-87 southbound frontage road and the slip ramp back to the I-87 mainline form the southern boundary of the weaving section. Weave C is a Type A weave. Why? In a Type A weave, both of the weaving traffic streams must change lanes once in order to reach their desired destination. Let's consider how this applies to Weave A. Traffic on the circular loop ramp from I-87 southbound desiring to travel to U.S. Route 9 must cross the crown line to reach this exit, and thus change lanes once. Similarly, traffic from the northbound I-87 exit ramp desiring to stay on Alternate Route 7 must change lanes once in order to be in the two left most lanes, the mainline for Alternate Route 7. The crossing of these two streams produces the turbulence that defines a weaving section. Local traffic engineers have estimated that 30 percent of the traffic entering the section is weaving, while 70 percent is through traffic or is not weaving.
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