Fixed devices for GPS collection are in fact in-vehicle systems that include a GPS device which can be easily adapted to record and send data files for route identification and characterization. According to existing literature and to the results of the FREILOT project [18,19], two categories of devices can be defined. The first is that of in-vehicle driving support systems, like route assistance or driving help tools [5,11]. Those systems include already a GPS and use position information to estimate different indicators, such as speeds, accelerations, distance to a given destination or gap with respect to an advised path. It is then easy to convert the collected data into position records. The advantages of such systems are that the route calibration and the map matching processes are already integrated. However, those tools are part of commercial services and the various providers do not aim to provide very detailed information. Indeed, although in some cases data each second or two seconds is provided, in other cases the most dis aggregated data are each 2 to 5 minutes, a too large time period to estimate instantaneous speeds and accelerations.