What is the maximum allowable slope for driveways according to building codes?

The correct answer to the question about the maximum allowable slope for driveways according to building codes is 10%. Building codes typically set the slope limit for driveways to facilitate safe and convenient access for vehicles and pedestrians. A slope of 10% (or 1:10) allows for efficient drainage and minimizes the risk of vehicles losing traction, particularly during wet conditions.

Higher slopes can create challenges for both vehicles and people, as they may lead to difficulty in maneuvering and increase the likelihood of accidents. Furthermore, steeper slopes may not comply with accessibility standards, which are essential for universal design.

It's important to consult local building codes as they can vary by jurisdiction, but generally, a 10% maximum slope is consistent with safety and accessibility guidelines in most locations.