• The challenge of obtaining ground truth for GPS processing 

      Stopher, Peter; Shen, Li; Liu, Wen; Ahmed, Asif
      Published 2015-03-01
      The increasing use of GPS as a substitute or complement to conventional travel surveys has brought with it an increasing need for a reliable source of ground truth, i.e., information on the actual travel in which each ...
      Open Access
      Working Paper
    • Human Energy Expenditures and Travel Time Budgets 

      Ahmed, Asif
      Published 2014-12-18
      This research aims to explore the cause of stability in travel-time expenditures for an individual, which is seen to be invariant within the context of geographic location and time, and which is commonly known as the ...
      USyd Access
      Thesis