A square has several footways leaving in different directions. I know the footways and the border of the square should be connected with a common nodes. But should the footway stop at border or should they drawn out on the square? And if so how much? Should all the footway connected together on a common node in the middle of the square? Any wiki page with an answer to this?

A square has several footways leaving in different directions. I know the footways and the border of the square should be connected with a common nodes. But should the footway stop at border or should they drawn out on the square? And if so how much? Should all the footway connected together on a common node in the middle of the square? Any wiki page with an answer to this?