Cloud technologies have gained high popularity in recent years. Due to the digital transformation in past decades, information- and info-communication technologies (ICT) have become highly recognized in all sectors. Cloud technologies have appeared as scalable, agile, secured, and global solutions. Next to advantages though, several barriers are identified. In this paper, we review the main cloud computing models, the advantages and barriers of cloud technologies, as well as the special state of transportation. Based on the review, we introduce the role of the National Data Economy Knowledge Centre in transportation development, especially focusing on proposed cloud applications.