MOTION has been an R&D-project ending with a Field Operational Test. MOTION has been partly financed by the Swedish IVSS-program. In MOTION an offboard Speed Alert (ISA) service for mobile phones has been developed. Speed Alert is combined with a commercial offboard navigation system. The objective of MOTION has been to study how an ISA/Speed Alert application should be designed to achieve as high acceptance as possible by individual users. With high acceptance it will be possible to reach new potential user groups for Speed Alert and to increase the number of users several times.In order to enable a large user group, the solution is built upon the commercial offboard navigation systems Telia Navigator and Wisepilot for mobile phones. The systems are extended with Speed Alert. The driver can choose between three modes: Navigation mode, map mode or warnings only. An offset can be set by the driver to a value between -5 and +30 km/h and a warning occurs when current speed + the offset exceeds the current speed limit. The current speed limit is always visible. Data are pushed from the National Road database (NVDB) every night which means that speed limits are always up-to-date in the application. A field test has been carried out where log data from 650 drivers have been collected. All test drivers got questionnaires before and during the field test. In general the test drivers were very positive to the Speed Alert service. The target group for this kind of non-mandatory system is drivers that normally use navigation services and have a will to avoid too much speeding.