Concrete driveways definitely crack, which is a common occurrence with concrete driveways that lack control joints. When the cracks are pronounced or displaced (e.g., settlement occurs), they can become a tripping hazard for unwary passersby. Grinding unevenness produced by settling concrete slabs and/or mud-jacking are two ways to deal with this issue. If the cracks and settlement are pronounced, driveways are typically formed and re-poured.