Driveway designs should be a minimum of 9 feet wide. However, there might be reasons for to have a wider one.
You might have very large vehicles, perhaps large trucks, that often need to use your driveway. The maximum width I would go would be 12 feet.
It is not that long and you need it for parking side by side. Your driveway should then be 18 feet wide.
Your driveway has curves and you might feel more comfortable with a wider space. You can make it anywhere from 10 to 12 feet wide.