- STEPHEN MILLER
- May 8, 2017
A new before-and-after study of bike share in New York City shows that thousands of bus trips are now likely being made by bike instead.
For every thousand Citi Bike docks added along Brooklyn and Manhattan bus routes, bus trips dropped by 2.42 percent, according to a new journal article from Kayleigh Campbell, who recently received a Ph.D. from Columbia University, and secondary author Candace Brakewood, an assistant professor of civil engineering at the City College of New York. (I’m acquainted with Brakewood; we served together on TransportationCamp NYC’s volunteer committee.) Their peer-reviewed research, which studies trips between May 2012 and July 2014, controls for a wide variety of factors in an attempt to isolate the impact of bike share on bus ridership.
“We both had this research idea separately,” says Campbell, who recently completed a dissertation about the unintended long-term impacts of transportation. Brakewood, meanwhile, was working on a journal article that showed real-time bus information in New York led to a 2 percent increase in bus ridership. After they both queried the Metropolitan Transportation Authority for data, the agency connected them with each other. “It was a really natural collaboration,” Campbell says.