 The Victorian Government has been continuously blocked from increasing density in existing suburban areas, such as the City of Boroondara, by "residents' groups" who continuously object to new medium-density developments, greatly hindering the progress of the blueprint.However, it is these same groups who oppose the urban sprawl of Melbourne, the only other option short of refusing residence to new arrivals.The Public Transport Users Association criticised the target of 20% of motorised trips transferring to public transport by 2020, claiming that the existing system is at capacity and could not cope with a tripling of users without expansion and increased frequency of services.