D. Bauer, N. Brändle, S. Seer, M. Ray, K. Kitazawa:
"Measurement of Pedestrian Movements: A Comparative Study on Various Existing Systems";
in: "Pedestrian Behaviour: Models, Data Collection and Application", H. Timmermanns, G. Imho (Hrg.); Emerald Group, Publishing Limited, Bingley BD16 1WA, United Kingdom, 2009, ISBN: 978-1-84855-750-5, S. 301 - 320.

Management of large pedestrian infrastructures such as junctions of mass
public transport, airports, or shopping centers needs measurements of
pedestrian movements. These measurements are necessary to quantify and
monitor the demand for the infrastructure in order to correspondingly adjust
supply. Pedestrian movement measurements are also needed to provide services
relating to safety (such as temporary access restrictions), security, and
convenience of the users.
While a multitude of different sensing equipment is commercially available,
knowledge on the relative merits is sparse. This chapter provides an overview
of a number of different sensors for measuring pedestrian movement. The
main emphasis lies on comparisons of advantages and disadvantages of the
various approaches. We investigate properties of the systems with respect to
comparative advantages, accuracy, and limitations. The objective is to provide
guidelines to support selecting the most appropriate sensing equipment for
a given measurement problem. The text also hints at ``blind spots´´ indicating
the need for further research. As such this chapter is of interest both for
practitioners and researchers.

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