Hi there,

Looks like you may be confused with highway=footway multipolygons. Right now you're using them as if you're mapping a large non-linear routing area. I think you're meaning to map them to show the area of the sidewalk, but that is tagged as "area:highway=footway" (and the sidewalk tag is left out).

Also, you should always still use linear ways for the actual sidewalk, otherwise routers can't use it. 