Bypasses

This definition from the Hitchhiker's Guide to the Galaxy seems to apply quite universally to many problematic situations:

Bypasses are devices which allow some people to dash from point A to point B very fast whilst other people dash from point B to point A very fast. People living at point C, being a point directly in between, are often given to wonder what’s so great about point A that so many people from point B are so keen to get there, and what’s so great about point B that so many people from point A are so keen to get there. They often wish that people would just once and for all work out where the hell they want to be.