Bicycling in the New York City core continues to rise, according to the latest counts from the city. But the methodology NYC DOT uses to measure year-over-year changes in cycling is also showing its age. To get a clearer picture of citywide cycling activity, DOT will have to start doing annual counts in more places.
From the bottom to top, the colors represent average daily bike crossings from 7 a.m. to 7 p.m. at the Hudson River Greenway at 50th Street; the Queensboro, Williamsburg, Manhattan, and Brooklyn bridges, and the Staten Island Ferry. Graphic: NYC DOT
DOT’s screen line bike count shows cycling increased across the boundaries of the Manhattan central business district 8 percent in 2013 [PDF]. (The counts aren’t on the DOT website and the press office didn’t respond to Streetsblog’s request for them, so we got them from an unauthorized source.)
DOT conducts the screen line count by tallying cyclists several times between April and October at the Hudson River Greenway at 50th Street, the four city-owned East River bridges, and the Staten Island Ferry terminal. The great thing about it is that the agency has used the same methodology, more or less, since 1985, so it now provides a 30-year trendline.
You can tell from the historical record that the city’s investment in safer bikeways has paid off — the screen line count has nearly tripled since 2005.
Citywide measures of cycling, meanwhile, also show upward movement, but not as much as the screen line. The Census (which has its flaws) shows a 40 percent increase in bike commuting between 2007 and 2012, and in an annual Department of Health survey, the number of New Yorkers who report biking several times per month increased 16 percent from 2007 to 2012.
In other ways, though, the screen line appears to undercount cycling — namely, it’s not capturing all of the growth due to bike-share.