[ivan_gammel]

In many cases you are absolutely right, the appointment times can be adjusted according to train schedule, destinations are nice places where you can find something to do in between etc. Public transportation in Germany in most cases is better than cars (I do not even have driving license for that reason - never needed it). Still, the calculation logic is right: when you travel somewhere to be there at certain time, you need to include some buffers in your planning, both for trains and for cars. Every 4th train in Germany arrives with delays and not every appointment can be planned for your convenience.