| +/- highway=pedestrian
For Roads , i.e. mainly / exclusively for pedestrians (often Shopping Areas).
For town centres and civic areas, where wide expanses of hard surface are provided for pedestrians to walk (often between shops).
How to map
In the case you want to map a complete area for example a market place or plaza create a closed area with the ways and attach the area=yes tag to it.
highway=pedestrian together with area=yes is also the common way to map squares and plazas. Draw the way at the outer limits (usually walls, buildings, etc.), not in the center of the roads. If there are roads passing over, map them as usual and make connecting nodes at all intersections with the pedestrian area.
Vehicles may be allowed during special hours to unload merchandise, but are often prevented from entering by bollards.