The exhibition for the Sydney Metro City & Southwest – Chatswood to Sydenham project including Waterloo Station is on exhibition until 27 June 2016. You can make a submission at this link. You should indicate if you supoport or opppose the project and make your comments – such as its impact on the Waterloo public housing estate.
http://www.majorprojects.planning.nsw.gov.au/index.pl?action=view_job&job_id=7400