RTM Districts are the same as your voting District. Greenwich voters go to the same polling place for every type of election: municipal, state or federal. The actual "voting districts" do change each year, which means there may be more or fewer lines at a polling place. These lines represent the various districts and the different ballot styles in use for each district. You can check your voter status here.
RTM and State Assembly Districts and Polling Places (PDF)
RTM Districts - Boundary Descriptions (PDF)
RTM Districts - Detailed (PDF)
RTM Districts and Polling Places (PDF)