Simões, AnabelaCarvalhais, JoséGomes, AnaCarriço, Luís and Correia, Nuno and Antunes, Pedro and Jorge, Joaquim2021-11-022021-11-022021978-3-03868-166-3https://doi.org/10.2312/pt.20041497https://diglib.eg.org:443/handle/10.2312/pt20041497This paper is centred on the usability of modern inf ormation systems in the context of transports. The main concern for in vehicle navigation systems is focused on the safety issues related to the interference of an additional task on the driver cognitive activity to perform tlu! driving task. Theref<re, the interface should be designed in a way to reduce the glance frequency and duration, as well as the driver's mental workload. The inf onnation systems developed for public transport (PT) use aim at providing relevant and useful informatm to users, as the PT informdion systems providing real-time passenger information are recognised to be a way of encouraging the use ofpublic transport. However, the usability of the!I! systems is an important request for the accomplishmert of their fun:tion. Tlu! paper focuses as well the main recommerdations f<r the usability of these systems resulting from usability evaluations carried out in the ftume of F.uropean and Nationalresearch projects.Navigation SystemsRed Túne uformation SystemsMental Workloadlnformation ProcessingUsability10.2312/pt.2004149757-66