If you change from one line to another without interruption (e.g. stopovers that take less than 20 to 30 minutes), you will not be required to check out. FAIRTIQ will recognise that you changed line and calculate the optimal fare.
For longer interruptions, we recommend a temporary check-out. When you resume your journey, simply check-in again. This has no influence on the calculation of the price. The system calculates automatically all journeys and computes the cheapest ticket combination possible.