The World Road Association – PIARC recently published a literature review with an overview of numerous big data sources and the data-processing methods that can be used to analyse data for road condition monitoring. This review focuses on solutions that allow data to be collected quickly, in real time and repeatedly, e.g. via CAN bus, smartphones, digital imagery, open data, crowdsourced data, satellites etc. Also, a summary of several completed or ongoing projects that have utilised many of the big data sources is included in this document.