In this paper we discuss the structure and dynamics of this consensus process through an exploration of a series of challenges to the regime. These challenges include: (1) cultivating new sources of project finance, as the federal government reduces its contribution; and (2) integrating transport projects with regional and local land use plans designed to manage urban growth; in the context of (3) intensifying competition between -business centers within the region, as rapidly growing suburban areas seek transport projects that will facilitate locally-oriented economic growth. We first discuss the institutional and normative elements of the regional consensus process in historical context. We then develop a set of case studies that illuminate the challenges confronting the regime and the nature of regime responses.