Of Bloom's looking out the carriage window "at the lowered blinds of the avenue," at the beginning of Hades, Gifford observes that "In Irish tradition, blinds were lowered and shops closed during a funeral in a village or, as here, on a street or in a neighborhood." Two paragraphs later, we learn that the house is "number nine," but not until much later does the novel reveal that the "avenue" is Newbridge Avenue in Sandymount, a near suburb on the SE edge of Dublin.
The newspaper that Bloom reads in Eumaeus discloses that on the morning of June 16 "the remains of the late Mr Patrick Dignam were removed from his residence, no 9 Newbridge Avenue, Sandymount, for interment in Glasnevin." This, then, is the originating point for the funeral procession narrated in the first half of Hades. The carriages travel north from Sandymount through Irishtown to Ringsend, then move west through the southern part of central Dublin, cross the Liffey and turn north up O'Connell Street, and from the top of that street they proceed northwest to Prospect cemetery in the near northern suburb of Glasnevin.