Technology that provides Metrolink crews with advance warnings about earthquake activity, enabling them to bring commuter trains to a safe stop before the shaking starts, will be used on the Perris Valley Line, it was announced Friday, Sept. 10.In a partnership between the California Department of Transportation, U.S. Geological Survey and the cities of Perris and Riverside, the Earthquake Early Warning System will be activated as part of a pilot project in Southern California.The system is tied into the USGS' “ShakeAlert” network and will ultimately be linked to Metrolink's Positive Train Control platform, with the goal of slowing and stopping commuter trains automatically, without crew inputs.For the time being, however, the yearlong pilot project calls for notifications
