This paper focuses on real-world applications of Global Navigation Satellite Systems (GNSS) in the field of Intelligent Transport Systems (ITS). The key advantages offered by satellite technology of observation, telecommunications and navigation, are highly suited to the needs of future transport systems of all kinds. The paper will outline the various current European based applications of satellite navigation systems to intelligent transport systems, drawing on recent European telematic research project findings and good case study examples of early system implementation throughout Europe. With regards to recent EU research, the paper will give an overview of current cutting edge transport research and its implications for the use of satellite navigation technologies and will summarise the key findings from recent test implementation schemes and detail the opportunities for future market exploitation. With regards to the case study examples, a range of full scale and partially implemented Intelligent Transport Systems will be highlighted, with reference made to costs and benefits to society. The paper will therefore report on a wide range of successful land based transport systems utilising satellite navigation technology which have been brought to the market in recent years, including developments in the following systems: Automatic Vehicle Location for monitoring public transport; Real-Time Passenger Information for public transport users; In-Vehicle Dynamic Route Guidance for car drivers; Road User Charging to better manage the demand for road space in congested networks; Intelligent Speed Adaptation to control the speed of vehicles externally for improved road safety; Demand Responsive Transport to provide a door-to-door service for disabled and elderly travellers; Traveller Information Systems for improved and integrated travel information for travel by all modes; and, Fleet Tracking Systems for better management of freight movements and goods delivery. Future transport applications will also be considered, with the emphasis being placed on novel and interesting potential developments to aid safety, improve the flow of traffic and provide enhanced travel information services and thus generate an integrated transport system with social, economical and environmental benefits. Potential future applications include: Automated Highways, Remote Sense Parking, Vehicle Access & Control systems, Floating Vehicle Data, Automated Freight Delivery Systems, Personal Navigation, and future transport modes such as Personal Rapid Transit and Cyber-Cars, i.e. driver-less vehicles. In conclusion the paper will outline some exciting new developments and intriguing future applications for Satellite Navigation Technology in the field of Intelligent Transportation services provision.