Rise of the Rotems. After many months of extensive testing and fixing a radio issue, Metrolink's new Hyundai Rotem cab cars can now be seen leading trains around Southern California. Here we see cab car #642 leading train 367 to Los Angeles, with new Rotem passenger car #211 behind the engine. The cars feature Crash Energy Management (CEM) technology, which absorbs the energy of a crash, greatly decreasing the number of passenger injuries in the event of a collision. Metrolink is the first railroad to purchase these cars, part of their goal to become the safest commuter railroad in the country. By the end of 2012, Metrolink plans to have 137 of these cars, which will replace most, if not all, of their current Bombardier fleet.