A patent was granted on October 1, 2013 to a team of researchers from the Center for Urban Transportation Research (CUTR) and the College of Engineering at the University of South Florida. United States Patent and Trademark Office patent US 8,548,724 is titled System and Method for Real-time Travel Path Prediction and Automated Incident Alerts.
A path prediction method that uses a commuter's travel patterns to predict their route and destination, and transmit road advisories via a GPS-enabled device. Once the user's location data is transmitted via a GPS-enabled device it is then catalogued and stored in a GIS database. The user's current travel path is then compared to their path history and statistics and a destination is determined based on related spatial and time properties. A warning is then automatically delivered to the user if there is an accident along their predicted path, without requiring any request or input form the user.
I'd be surprised if there are already systems that do this.