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Analysis - Page 3 of 3

ID# C2060A3

Problem 6: Route 146 Arterial Study

The PM Existing and PM Without volumes used in the analysis are shown in Exhibit 2-65. There are unsignalized side streets in the network, such as Bruno Road, Tallowood Drive, and the Municipal Plaza, but the traffic volumes on these roads are not substantial. You’ll also see the tangential network involving Old NYS 146, Park Avenue, and Plank Road that we’ve decided to omit from the present analysis. You could argue that at least the extension of Clifton Country Road north across Old NYS 146 and Park Avenue should be included because there are times when the queue at Route 146 does back up across the Old NYS 146 intersection. In this analysis we haven’t done that.

The other information we had to specify included:

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saturation flow rates for each of the lane groups in the bullet list above

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volumes for each of the lane groups

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signal timing plans (these are consistent with the HCM input datasets)

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distances between the intersections

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link-to-link relationships for the way in which the flows cascade through the network from upstream intersections to downstream intersections

bulletminimum phase lengths
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opposing links for the permitted lefts and the right turns that can move when there is no competing traffic, as at Clifton Country Road northbound

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