The OECD Metropolitan Governance Survey has found that the share of residents who are satisfied with the public transport provision in their cities is 14 percentage points higher if a transport authority exists (Figure 2.2). It appears likely that this is at least partly due to the better integration of public transport in these cities. For example, a metropolitan transport authority could be autonomous exclusively in charge of transport issue, or part of a metropolitan authority in charge of w ider policy issues at the metropolitan level.