Relatively few people commute to work by public transport, though many more could do so. Transit oriented development can bring workplaces closer to frequent public transport and so reduce the need for car commuting. However, changes in the built environment alone may not change commuting choices significantly. Workplace travel plans could be used to leverage a greater shift from solo car trips to alternatives like public transport. In Perth, the TravelSmart Workplace program is supporting workplace action to encourage travel behaviour change through travel plans (known locally as green transport plans).