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Asphalt and tarmac are not the same thing. Traditional tarmac, short for tarmacadam, uses tar as a binder to hold crushed stone together. Asphalt uses bitumen—a byproduct of crude oil—to bind aggregate. Though tarmac was once a go-to for roads, asphalt has become the modern standard. And these days, most surfaces referred to as “tarmac” are actually asphalt. So, while the names may overlap, the key distinction lies in the binder—tar for tarmac and bitumen for asphalt.

The best steep driveway material is permeable pavers filled with gravel or crushed stones. Plastic, rubber, and concrete pavers all work to allow water to run down your driveway without washing away and eroding your driveway. These paver materials also do well with ice and snow, unlike brick or concrete pavers. You can also install a driveway retaining wall to help prevent pavers and gravel from shifting over time.

Yes, pea gravel is good for driveways as long as your driveway isn’t built on a hill or any type of slope where it can slide. It’ll settle on a flat surface and create a suitable driveway over time, though some spreading initially will take place. If you're wondering how to make a gravel driveway in a high-rainfall area, using pea gravel could help you to cut down on costs needed for extra drainage solutions.

Gravel driveways last the longest. With proper installation and routine maintenance, they can last upwards of 100 years. To make sure they last as long as possible, gravel driveways should be properly graded and leveled during installation and repair. The natural material is extremely durable, but the grooves make it challenging to remove snow and easy for weeds to grow through the cracks. Still, this is nothing an afternoon DIY project can’t fix and lends to the fact that their easy maintenance helps gravel driveways last even longer.