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Maintaining a driveway depends on its material. For concrete and asphalt, it's best to clean the surface thoroughly twice a year with a stiff broom and a pressure washer to remove accumulated dirt and debris. Sealing the driveway is crucial to protect it from water damage and freeze-thaw cycles. Before applying a sealant, pressure wash the surface to remove any loose sealant, dirt, or stains, as sealing over them will trap them. Any cracks or expansion joints should be filled with a flexible polyurethane caulk or asphalt sealer. In colder climates, use sand instead of salt for de-icing. Sand helps melt snow and ice without accelerating the freeze-thaw process, which can cause cracks.

A driveway's lifespan varies by material. Asphalt driveways typically last 15 to 30 years, while concrete driveways last longer, between 20 and 50 years. The longevity of any driveway is affected by factors like extreme temperatures, heavy traffic, and the quality of maintenance. Regular upkeep, such as filling cracks, resealing the surface, and ensuring proper drainage, can help extend its life. For gravel driveways, regrading to fill in uneven areas every year or two is recommended.

While water-related pressure caused by poor drainage is one common cause of paver cracking, other factors can include ground movement beneath pavers, heavy loads and wear and tear over the pavers, and climates with constant freeze-thaw cycles. In general, pavers should be resealed every three to five years to prevent cracking.

You can pour concrete over asphalt if it’s in good condition, thick, stable, and well-compacted. Concrete is more durable than asphalt and can extend the lifetime of your driveway without having to pay frequent asphalt driveway repair costs or replace it completely. 

But this is best reserved as a temporary solution based on budget restraints, as asphalt requires more frequent repairs and assessments than concrete. Once that concrete top is poured, it’ll be harder to accurately understand what’s happening beneath that layer, which could lead to more issues.