The German special interest magazine ETR report on the PJM tests of approval of the suburban rail in Berlin (S-Bahn Berlin). Despite of the tough schedule and the comprehensive measurements, PJM finished the project in time - due to the highly experienced team and a many years expertise in analysing complex data. 
Get the full story (in German language).
Credit: Claudio Schwarz/Unsplash
PJM tests of S-Bahn Berlin