And there is a pretty cool open data set for current and historic traffic information (speeds, travel times, etc): http://www.ndw.nu/pagina/nl/103/datalevering/

And there is a pretty cool open data set for current and historic traffic information (speeds, travel times, etc): http://www.ndw.nu/pagina/nl/103/datalevering/120/open_data/ http://www.ndw.nu/pagina/nl/103/datalevering/120/open_data/ (page only in Dutch).