Integrating knowledge forms in public transport planning and policies: the case of the Lisbon metropolitan area

Public policy debates about transport planning are often focused on more technical analyses to the detriment of other forms of knowledge. Combining document analysis and interviews with relevant actors, we identify a clear imbalance in the design of transport planning in Lisbon’s Metropolitan Area. There is a clear prevalence of political knowledge, with conflict among key actors as the major source of knowledge and the neglect of other forms, particularly those associated with deliberative processes. The findings also suggest that these imbalances decrease the legitimacy and optimality of potential solutions to complex problems in Lisbon’s transport policy.