The maximum driveway slope is a 1:6 gradient. It's advisable to ensure that you have the right transition lengths if your driveway has a gradient of more than 1:10. This will help you prevent the vehicle from grounding. You should also note that this sloping restriction applies to private drives, shared private drives, and private roads. Some of the safety measures for sloped driveways include the following.
Sloped driveways can be pretty dangerous for vehicles. The first step to ensuring that your sloped driveway is safe is to choose a material that won't be slippery in wet or icy conditions. This can include something like a brick or resin-bound surface. Driveway materials such as concrete can be quite slippery when wet but you can always add a non-slip coating. Something like gravel can roll down depending on how sloppy the driveway is, making it a less safe choice.
Another measure would be ensuring that the driveway slope isn't a hindrance to any driver's view of the road or pedestrian. You can improve the visibility by adding LED lights along the sloping driveway. It will significantly improve safety, especially at night or when there's low lighting.
You should also prevent your sloped driveway from flooding by ensuring that you have proper drainage. There are different drainage designs that you can opt for depending on the type of driveway you choose. With porous driveway material, drainage won't be necessary because the water can naturally drain into the ground, unlike impermeable material.
If your new driveway is elevated, you can consider adding guardrails or suitable paving protectors to avoid vehicles driving over. This will make your sloped driveway safer for anyone using it. You can always add a signage or marker to indicate the sloping of the driveway.
Another way to ensure that your sloped driveway is safe is by ensuring that it's regularly maintained. This will help you spot any racks or potholes and have them fixed before they cause any hazards. You should also clean your driveway frequently especially when there's snow to prevent it from being slippery.