According to estimates made by the New York State Department of Transportation (NYSDOT) in 2009, NY 73 serves an average of 1,950 vehicles per day from US 9 to the east end of the NY 9N overlap in Keene. The overlap with NY 9N accumulated an average of 4,360 vehicles, with the stretch up to the control station at having a less amount of traffic. After NY 913Q, the average increases, peaking at 4,810 vehicles at NY 86 in Lake Placid.