TTCI played a major role supporting the commissioning of the Siemens Charger diesel locomotive that was completed in 2017. The test program, which began in 2016, included fault free endurance, braking, acceleration test and field modifications on 39 locomotives. The 30-day endurance tests, the highlight of the program, involved trains running on two tracks simultaneously for over 20 hours per day. Throughout the testing, TTCI and Siemens worked to together identifying and correcting issues that could only be discovered with dynamic high-speed testing. Final destinations for these locomotives included Illinois, Florida and Washington.