This study check the development of a Webbased Participatory GIS providing access to field-collected information. Exploiting the idea of participatory sensing which conceives human beings as a network of continuously monitoring sensors, a sample of users was instructed on how to use their mobile devices in order to gather georeferenced data related to road pavement damages. User-generated content was stored and managed into a spatial database and then Web published as a WMS layer. Two main innovations can be pointed out with respect to PGIS literature. The first is represented by system access from mobile devices, which allow to spatially interact with data by means of touch commands. Ad hoc versions were developed for both the large-screen tablets and the small screen smartphones. Secondly, the implemented architecture was fully developed with FOSS tools, which proved to be suitable for the research objective. In accordance with the fundamental paradigm of PGIS, real-time citizen local knowledge provided a precious means for dealing with decision-making processes in an effective way On the other hand, data collection on the field performed through the ODK Collect application pointed out some limitations. First, road damages positions registered from the user GPS devices proved sometimes to be inaccurate. This was due to both the low performance of the GPS receivers themselves and the non-matching between the survey position and the position of the photographed damage phenomenon. In order to overcome these issues, as well as to allow users to perform field-data collection even without a GPS-equipped device, an intervention on the Android ODK Collect code is planned, which provides users with an interactive map where they can manually place the point of interest.