The number of roads and tunnel sensors at the infrastructure is continuously increasing. Each of these systems fulfill a specific purpose and increase the safety of the users. In most cases, this also succeeds, but frequent “false alarms” cause that the operators mistrust the messages and ignore the system at all. If an accident is happening, then the reaction time is often too long . This tension between detection and false alarm rates can only be solved with an additional process to “fusion” all sensor data into an overall intelligent solution . If you find this topic of interest, then visit us on the TUNNEL SAFETY & VENTILATION” Congress in Graz (see events).