• Level of service

See main article, Bikeway network research.

Dill's Bike GPS Project was a radically different travel survey in the area of bicycle trip making. Outfitted with GPS recorders, 166 cyclists went about their business each day for a week. The respondents then confirmed their trips by viewing a map of their activity; they also answered questions about the purpose of each trip.

From the Bike GPS Project website, I've selected a few interesting findings:

• “For over half (52%) of the miles bicycled on bicycle-only utilitarian trips were made on facilities with bicycle infrastructure, including lanes, separate paths, or bicycle boulevards.”
• “Bicyclists spent a higher share of their miles on facilities with bicycle infrastructure and on low traffic streets than the shortest paths predicted.” In other words, on most trips, bicycle riders in the survey went a little out of their way to ride on streets with either bicycle infrastructure or low traffic.
• “Shorter trips are most likely to occur in areas with a greater mix of land uses and higher network connectivity, making potential origins and destinations closer.”