In the European Union every member state have the create a single point of access for (realtime) traffic information. In germany this single point of access is called MDM (http://www.mdm-portal.de/en/). Here you find partners which are providing traffic information which can be relevant for your service. For example some road operativers providing information regarding the realtime traffic volume or road works on this data marketplace for free. The marketplace acts as an broker between the data provider and the user of the data (e. g. your company). You should take a look on the MDM and perhaps you have an additional source for high quality traffic information.