The Effect of Snow on Traffic Counts in Western New York State

Abstract

hile most people know anecdotally that weather affects traffic, relatively little research has examined the correlation between snow and traffic in great detail. Most studies have also been difficult to generalize for other areas and regions where drivers may be accustomed to more (or less) snow.This study examines the relationship between snow and traffic volumes in western New York State, an area that is regularly inundated by snow (more than 225 cm most seasons). Total daily traffic counts for the New York State Thruway (Interstate 90) showed a moderate negative correlation to snow for the period of study (2003?10). However, this correlation is caused by the large number of passenger cars and other similar vehicles on the road. Most other vehicle types, such as tractor trailers, had no correlation whatsoever. Additionally, the results for all vehicle classes were similar for both suburban and rural areas. Finally, it was observed that the ratio of large to small vehicles increases during snow events.