The Decarie Expressway trench and the mainline of the Canadian Pacific railway each forms barriers that arguably disrupt the cohesiveness of the borough. As such, sections of NDG have unique characteristics and be characterized as well-defined neighborhoods. As an example, the sliver of NDG running between the rail line and the Saint-Jacques Escarpment (from Cavendish Boulevard to the Décarie Expressway) is known as St. Raymond's and has a strong association with Montreal's Italian community. Another section, separated from the rest of NDG by a highway trench and sharing a border with Westmount, is closer to where the village of Notre-Dame-de-Grâce was founded, and as such is occasionally referred to as 'Old NDG'.