1 Data obtained in previous studies1,2 using a fi xed on-site monitor indicated that travel by car resulted in lower CO exposure than travel on foot. 2 According to Figo et al. (1999), the median exposure of car passengers was 11% lower than for those walking.2 3 In our study, modelled emission rates were obtained using the Traffi c Emission Model (TEM), a CO- exposure modelling framework developed by Ka.3 4 Modelled results were compared with actual roadside CO concentrations measured hourly at a fi xed monitor. 5 Figure 1 shows the results obtained using TEM.
Chapter 80