Moreover, information on transportation modes for each trip
from a mobility survey combined with GPS and accelerometer
data would allow researchers to investigate the relationships
between transportation behavior, physical activity, and health
as an emerging field of research. For example, in the RECORD
Study, GPS and mobility survey data are used to elaborate for each
participant an accurate timetable over 7 days as the succession of
the activity places visited and of the transportation modes
between them. Our aim is to analyze the accelerometer data
according to this timetable, for example to assess differences in
energy expenditure between trips with different transportation
modes or chains of modes