In running the full width of the sidewalk and obviously you can
stick a quarter in the making at a large crack. This crack can be filled
with an epoxy caulking to help with dirt and plants that will continue
to grow from it.
You can see the Black arrow points to some dry weeds of some sort.
This crack is obviously not a safety hazard because either side of the crack has not raised.
Obviously if the crack gets very much larger it will become a safety hazard.
Back to Large Crack in Sidewalk