The Ninth World Road Congress – Lisbon, 1951

The congress’s logo, Lisbonne, 1951.


The Permanent International Association of Road Congresses (PIARC), founded in Paris in 1909, had an important role in the transnational production and circulation of knowledge regarding road engineering and management, and traffic regulation. The Ninth World Road Congress, held in Lisbon in 1951, assessed the progress made since The Hague Congress (1938). But it also had a national, Portuguese agenda: it served to affirm the political and technical relevance of both Estado Novo dictatorship and the Portuguese highway engineers.