The study aimed to identify the level of data openness of the state traffic departments in Brazil (DETRANs). Two assessment instruments were used: Berners-Lee’s (2010) Five Star Scheme and the 15 Open Data Principles proposed by Opengovdata (2007). Based on them, a methodology for structured analysis was built, and used to analyze three sets of data: related to the National Driver's License (CNH), to vehicles, and to traffic violations. Results indicate a low level of openness, lack of standardization, and the absence of specific regulations to stimulate or oblige the publication of traffic data in open formats.@en