Satellite navigation technologies are the major technological enabler for improving safety and efficiency of vehicles mobility in urban and suburban areas. The potential to reduce the cost and the air pollution caused by traffic jams, to decrease the trip duration, to better exploit the existing road infrastructures, to provide faster and automated relief in case of accidents, to increase the vehicle active safety adapting to the road and environmental conditions, are only some examples of the benefits that the integration of satellite navigation technologies can provide to the road sector. In this frame the Italian Space Agency (ASI) launched in December 2008 the INFOSAT project. The main objective of this project is to design, develop at prototype level and demonstrate on the field, an integrated system based on navigation technologies and devoted to the following application areas: (a) electronic toll collection and accesses control, (b) traffic monitoring and control and (c) prevention, assistance and relief in emergency situations. INFOSAT project foresees different critical products useful for vehicular application: ELL critical product develops a differential correction computation algorithm, ALIVE and EIV algorithms aim to generate integrity information to be used for Emergency situation and toll collection and accesses control, iMAP that aims to integrate a map-matching algorithm with integrity information.