The red line shows the trace of a respondent carrying a GPS device.
Tracking the country's movements
Ipsos MediaCT conducts the travel survey fieldwork using GPS 'MobiTest' devices.
30,000 respondents have participated in the study.
Each participant is asked to fill in a questionnaire and to carry a GPS meter for nine days: two weekends and five weekdays. The meter tracks their location, second-by-second, for the entire period.
The information is collated and plotted onto a framework map of Great Britain.
The study is continuous, with GPS devices in the field throughout the entire year, except for two weeks at Christmas. The 'survey year' runs from September to August.
The MobiTest device (supplied by MGE Data) contains an accelerometer and can capture not only the location, but also the type of movement. For more information see www.mobitest.cz.