Summary

These are diagonal brick sidewalk curbs along with the square cobblestone streets.

This is a remix of the OpenForge2 Brick Sidewalks and Square Cobblestone Streets. The "a" tile includes brick, curb, and cobblestones while the "b" tile is the missing chunk of curb if you want to do more than one diagonal in a row. The diagonal curbs are "inside" the sidewalk half of the tile, which matches the square tiles, so no special tiles are needed on the cobblestone street side.