• Advances in GPS Technology for Measuring Travel 

      Stopher, Peter; FitzGerald, Camden; Zhang, Jun
      Published 2006-07-01
      Since the late 1990s, GPS has begun to be used as a method for measuring personal travel. Early devices were for in-vehicle use only and derived their power from the accessory socket of the car. In the early 2000s, the ...
      Open Access
      Working Paper