TransPosition has long had an interest in improving data collection techniques for transport. Our use of GPS for data collection began in 2003, when we developed a new dedicated passive GPS logger for semi-permanent placement inside vehicles. This was a unique product at that time, with its emphasis on out-of-sight, long term collection and incorporating temperature logging and tamper detection. At that time we also started work on algorithms to match GPS log data with road networks, to allow automatic creation of road speed profiles, traffic volumes, and other network performance characteristics. In subsequent years these algorithms have been improved, and they are currently being extended to allow mode and public transport route detection.