Using CyclePhilly data to assess wrong-way riding of cyclists in Philadelphia.

•Study utilizes data collected from a smartphone application to analyze wrong-way riding behavior of cyclists.•Probe bicycle datasets provide unprecedented resolution and volume of data that allow sophisticated safety analyses.•Non-commute trips are less likely to have wrong-way riding than commute trips.•The longer the trip, the more likely it is to have a wrong-way segment.•Segments with higher detour ratios (ratio of distance with detour to the wrong-way distance) have more wrong-way behavior.