A research titled ‘Mobile phone use by young drivers: effects on traffic speed and headways’ co-authored by G.Yannis, E.Papadimitriou, X.Karekla and F.Kontodima was published in Transportation Planning and Technology in June 2010. A field survey was carried out in real road traffic conditions, in which drivers’ speeds and headways were measured while using or not using a mobile phone. Results show that mobile phone use leads to a statistically significant reduction in traffic speeds of young drivers in all types of traffic conditions.