Walks on a path tile are stored in a 16 bit number, which contains the following information.

- bit 12..15 Normal (0) or centered (1) path tile walk.
- bit 8..11  The entry edge.
- bit 4..7   The exit edge.
- bit 0..3   The number of 90 degrees turns.

A normal walk uses the 'offset' of the person to make it move in the right area
of the tile (and the opposing direction uses the left area of the tile. A
centered walk is like a normal walk, but the person is gradually moved onto the
center of the path, to form a queue.

Within a tile, a person enters from the entry edge, and leaves at the exit
edge. (With 0=NE, 1=SE, 2=SW, and 3=NW for all edges.) If the walk at the tile
requires a change in direction, one or more 90 degrees turns are made around
the center of the tile (while respecting the offset in case of normal tile
walks), in counter-clockwise direction.