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FIGURE 6 Population Weighted Snowfall Adjusted for Impact on Propensity to Travel

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  Index*
1995-96 2001-02
Nov 0.7 1.0
Dec 0.3 0.7
Jan 0.0 0.7
Feb 0.4 0.8
Mar 0.4 0.8
Apr 0.8 1.0

* index = (40 minus summation counties of (precipitation in inches dot (county pop over state pop))) over 40
where 40 represents the rounded statewide average for December, January, and February 1995–1996, the months where precipitation is likely to be snow.

Source: New York State Department of Transportation (NYSDOT), Office of Policy and Performance, based on data from NYSDOT, Office of Operations Management.