Repairs deal with cracking, surface flaking, uneven panels and drainage faults before they become expensive. Heavy east coast low rainfall and the clays underlying much of the Hunter accelerate deterioration once concrete is already damaged, which is why getting in early matters here — water finding its way beneath a slab is what causes the movement, not the crack itself.
Expect the underlying cause to be identified first, whether that is ground movement, root intrusion from a fig or camphor laurel, a leaking stormwater line or inadequate preparation when the driveway was originally poured. From there the method follows the damage: crack injection, cut-out and patching, edge rebuilding, resealing or lifting sunken sections back to level.
Done properly, repairs restore both function and appearance, remove trip hazards and stop water pooling where it has been quietly undermining the slab. In a great many cases targeted repairs add years to a driveway that looked ready for replacement. A site inspection is the most reliable way to confirm the right approach.