Linking Activity-travel Analysis And Exposure
Assessment: Benefits And Challenges
Author(s)
D. Olaru, T. Beer, J. Powell & R. Gillett
Abstract
This study investigates the relationship between the activity spaces and exposure
to air pollutants, using personal activity and monitoring data.
The activity space embeds the locations in which daily activities are
performed and reflects various spatial and temporal processes that influence
exposure to air pollutants: household scheduling of activity routines, the
transport system, the time-space organisation of services, and the quality of the
environment.
Nitrogen dioxide (NO2) is the pollutant investigated in this study. Data were
collected over five months, during winter and summer 2004, using passive
samplers worn by subjects and deployed in seven micro-environments.
The individual spatial and temporal travel patterns were characterised and
more accurate exposure profiles were determined based on activity-travel
analysis.
Modelling results show that family members with similar activity spaces,
engaged in activities in various indoors and outdoors locations, may have
different exposure profiles due to different time allocation, different level of
contact with pollutants, intensity of activity, and different anthropogenic
characteristics. This is useful for identifying individuals potentially at greater
risk, not only because of the concentrations of pollutants, but also due to the
exposure durations and individual susceptibility to adverse effects.
Keywords: activity space, mobility, air pollution, personal exposure.
1 Introduction: concepts and definitions
Health professionals, policy makers, and the public are increasingly concerned
about exposure to air pollutants, especially in urban areas. Many recent
Keywords
activity space, mobility, air pollution, personal exposure.
Related Book
Other papers in this volume
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