Sub-problem 4c: Clifton Country Road 2004 PM - With vs. Without Conditions

It’s in the comparison of the with versus without conditions for the future design year, the traffic impact assessment finds its main emphasis. What network enhancements are required to accommodate the without conditions? Nominally, those improvements are the responsibility of the owning and operating agency. The differences between the without and the with condition are traceable to the development.

At the Clifton Country Road intersection, we can look at this without versus with comparison in the context of the PM peak, one of the major times when the impacts occur. Exhibit 2-45 presents the intersecting volumes for three conditions: the Year 2004 volumes without the site (2004 PM without); the percentage distribution of outgoing traffic (eastbound) and incoming traffic (westbound through, northbound left, southbound right); the site-generated traffic (vehicles per hour); the year 2004 with conditions; and the year 2004 with conditions with 30% more site-generated traffic. We will use each of the three intersecting volume conditions in our analysis.

Exhibit 2-45. Clifton Country Road Year 2004 Without and With Intersecting Volumes

Scenario Eastbound Westbound Northbound Southbound Total

L T R Tot L T R Tot L T R Tot L T R Tot

2004 PM Without 33 985 389 1,407 572 961 267 1,800 352 232 528 1,112 493 168 16 677 4,996

% Addition Distributed 1% 35% 14% 50% 0% 36% 0% 36% 13% 0% 0% 13% 0% 0% 1% 1% 100%

Site-Generated Traffic 3 106 41 150 0 108 0 108 40 0 0 40 0 0 2 2 300

2004 PM With 36 1,089 431 1,556 572 1,069 267 1,898 392 232 528 1,152 493 168 18 679 5,285

2004 PM With +30% 37 1,121 443 1,601 572 1,091 267 1,930 404 232 528 1,164 493 168 18 679 5,374

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