While some trains allow bicycles and the occasional city bus will let you load your cycle, public transport systems often discourage bicycles from being brought on. I get it: they take up space, can be bulky or cumbersome to load, and take time. Besides we should be encouraging more people to hop on the bus or subway and not just fill it with bicycles. Still sometimes with hills or distances, even cyclists need a break!
Leave it to the crafty Germans to find a new solution. In Stuttgart, they found a way to link city trams and portable bike parking in one, smart!