1999 representative household survey from 1 due day (Tuesday) by R+T Darmstadt
2016 representative household survey from 55 due days (Mon, Tue, Wed, Thu, Fri). Published is the internal traffic of the residential population within Freiburg. Surveying method according to SrV of TU Dresden by Omnitrend, Leipzig and PTV, Karlsruhe www.freiburg.de/modalsplit Download ducument