Sharing Data - Not With Us! Distrust as Decisive Obstacle for Public Authorities to Benefit From Sharing Economy.

Future mobility planning to cope with ongoing environmental challenges such as air pollution has to be anchored in the work of every public authority worldwide. One recent trend that could support public authorities to meet the European Union's sustainability targets is the creation and sharing of transport and mobility "big" data between public authorities via tools such as crowdsourcing. While the benefits of the use of big data to increase public authorities' efficiency and effectivity and their citizens' lives is well understood, examples from the public sector that highlight public authorities' engagement in such sharing activities is still missing.