Public health research has witnessed a rapid development in the use of location,
environmental, behavioral, and biophysical sensors that provide high-resolution objective …

In the past few decades, travel patterns have become more complex and policy makers
demand more detailed information. As a result, conventional data collection methods seem …

Recent studies have relied on GPS tracking to assess exposure to environmental
characteristics over daily life schedules. Combining GPS and GIS allows for advances in …

In the late 1990s, global positioning system (GPS) devices began to be used as a method for
measuring personal travel. Early devices were for in-vehicle use only and derived their …

Background Accurate information is lacking on the extent of transportation as a source of
physical activity, on the physical activity gains from public transportation use, and on the …

Using GPS technology in the collection of household travel data has been gaining
importance as the technology matures. This paper documents recent developments in the …

Motorized individual transport affects our urban lives negatively regarding its environmental,
social and economic aspects. To resolve mobility-related issues significantly and in the long …

Background Policymakers need accurate data to develop efficient interventions to promote
transport physical activity. Given the imprecise assessment of physical activity in trips, our …

Environmental health studies have examined associations between context and health with
individuals as statistical units. However, investigators have been unable to investigate …

The use of smartphone tracking is seen as the way forward in data collection for travel
behavior studies. It overcomes some of the weaknesses of the classical approach (which …