Through a click onto the map you receive an enlarged version.
Follow the red-dotted route into the historical center through the "Galgentor". Only by taking this route a free approach through the traffic- calmed zone is also granted on Saturdays and Sundays.
A detailed roadmap with some more interesting information you will find here as a .pdf-file (Acrobat-Reader) for a simple printout.
If Acrobat-Reader is not installed on your system yet, you can download it by clicking on the button on the left and afterwards install it.