Looking up a ride
Check the activities calendar if you are mainly coming for a bus. An announced ride makes clear which departure point and conditions of participation apply; an empty programme does not mean a ride is available on the spur of the moment.
Transport in context
The link with the public transport museum offers an opportunity to look at bus and tram side by side. Note their different uses and interiors, insofar as the announced activity explains them.
Making a choice in advance
Decide whether you want to attend a bus activity or visit the museum site on the Parallelweg. That prevents you from mistaking regular museum hours for the availability of the bus collection.
Before you go
If anything is unclear, ask directly about the departure point and booking. The Sunday opening of the public transport museum says nothing in itself about buses being present or rides going ahead.
Sources
This information has been compiled from public sources. Not everything has been confirmed by the museum itself; please check opening hours and prices on the museum's website.