The "TAPAS Cologne" simulation scenario describes the traffic within the city of Cologne, Germany for a whole day. The original demand data stems from TAPAS, a system which computes mobility wishes for an area population generated based on information about travelling habits of Germans and on information about the infrastructure of the area they live in. More information about the system can be found within this publication on TAPAS. The original data was using a closed-source road network and was mapped onto one stemming from the OpenStreetMap project.
There is further information about TAPASCologne.