Issues of signaling systems application in the tramway infrastructure – a case study

The application of state of the art track circuits is getting more and more popular on the Polish tramway infrastructure. The electromagnetic interference between traction return current and track circuits has become significant not only in the railways. The paper describes implementation of modern track circuits in the Polish tramway infrastructure and related electromagnetic issues. The on-site survey and proper measurements were performed to identify the electromagnetic interference problems. Authors conducted the analysis concerning the track circuit application in the tramway infrastructure, presenting its weaknesses that influence safety and reliability of the system.