The postwar boom had resulted in rapid suburban development, and it was believed that a coordinated land use strategy and shared services would provide greater efficiency for the region.The metropolitan government began to manage services that crossed municipal boundaries, including highways, water and public transit.Concurrent with the creation of Durham Region, the West Rouge area of Pickering south of Twyn Rivers Drive (the original course of Sheppard Avenue) and east of Port Union Road was annexed into Scarborough.[citation needed] The merger was proposed as a cost-saving measure and an administration improvement by the Progressive Conservative provincial government under Mike Harris.[21] Additionally, Ontario municipal affairs minister Al Leach touted it as a measure that would produce a stronger, more unified Toronto better equipped to compete in a global marketplace.[22] Canada Post mail standards do not forbid the use of former municipalities' names, relying on postal codes for accurate delivery.