This document discusses a study to understand bicyclist route preferences and behavior through stated preference surveys and revealed GPS data. It describes plans to conduct an in-street choice experiment survey in Copenhagen involving choice sets comparing routes defined by attributes like bike infrastructure type, number of other bicyclists and parked cars, green space, and travel time. The survey would collect stated preferences and recruit volunteers for GPS tracking to reveal actual route choices. The goal is to identify key attributes influencing route selection and inform simulation models.