• Deducing mode and purpose from GPS data 

      Stopher, Peter; Clifford, Eoin; Zhang, Jun; FitzGerald, Camden
      Published 2008-04-01
      Over the past several years, there has been increasing interest in the use of Global Position System (GPS) devices as a means to measure people’s travel. These devices have been used quite widely to check the validity of ...
      Open Access
      Working Paper
    • Determining trip information using GPS data 

      Clifford, Eoin; Zhang, Jun; Stopher, Peter
      Published 2009-01-01
      With the development of lightweight, high sensitivity Global Positioning System (GPS) devices, there has been increasing interest in their use as a means to measure people’s travel for travel surveys. Data-logging enables ...
      Open Access
      Working Paper