There is a lot of info here [1], summarized here [2]. Probably of the most interest to most people is "Improved Train Performance, Increased Ridership Capacity

There is a lot of info here [1], summarized here [2]. Probably of the most interest to most people is "Improved Train Performance, Increased Ridership Capacity and Increased Service: Electrified trains can accelerate and decelerate more quickly than diesel-powered trains, allowing Caltrain to run more efficiently. In addition, because of their performance advantages, electrified trains will enable more frequent and/or faster train service to more riders". [1]http://www.caltrain.com/projectsplans/CaltrainModernization/Modernization/PeninsulaCorridorElectrificationProject.html http://www.caltrain.com/projectsplans/CaltrainModernization/... [2] http://www.caltrain.com/Assets/Caltrain+Modernization+Program/Documents/PCEP+Fact+Sheet+May+2015.pdf http://www.caltrain.com/Assets/Caltrain+Modernization+Progra...