The authors of this 2010 paper, Dafna Merom, Hidde P. van der Ploeg, Grace Corpuz, and Adrian E. Bauma, analysed the continuous Sydney Greater Metropolitan Area Household Travel Survey (1997-2007) in 2009. They found significant increasing trends for all walking indicators and while cycling prevalences were low (<1.5%) they too showed significant increasing trends in all indicators. The authors concluded that transportation surveys can be used to assess the contribution of active travel to changes in physical activity levels assessed by public health surveillance and to identify subgroups for active travel interventions.
