Normal Needs Some Transfer Accelerators

I like this idea: a slide (called a "transfer accelerator") next to a stairway at a train station.  Something that's fun as well as useful. We could use fun ideas like this for transitioning the Constitution Trail over roads (or maybe railroad tracks?): a cool, tube-like structure that slopes gently up from one side of the road and down the other side. Walkways and stairs don't have to be boring and standardized. We are so restricted from creating fun alternatives because of the possibility of people taking unnecessary risks and suing others when those risks result in injuries. That's a shame.