Article continues below advertisementNew York City is a bustling region, where the sidewalks face extreme pressure - especially from foot traffic. The other area of pressure is the tree root growth. And with the passage of time, all these stress factors can end up creating little cracks on the concrete. It could appear absolutely harmless in the beginning, but the minor sidewalk crack can become a structural issue, that can result in expensive repairs.But it becomes tough to decide whether to replace or repair the sidewalk.