An NTUA Diploma Thesis titled “Critical factors of the influence of mobile phone use on driving behavior, based on smartphones’ data” was recently presented by Sofia Akritidou. Data from a six-months 200-drivers naturalistic driving experiment, collected through the OSeven smartphone application, were analyzed and four statistical regression models were developed, forecasting the percentage of mobile phone use while driving. The results revealed that the parameters affecting the use of mobile phone while driving are four: the percentage of driving duration with speed above the speed limit, distance driving, average deceleration, and average speed. For the general, urban and rural models, the average deceleration had the most significant impact, whereas for the highway model, distance was the most significant parameter.