Road curves are an important part of driving, as they provide a way to safely navigate turns in the road. The term 'road curves' can refer to two different types of turns: bends and esses. Bends are gradual turns that require drivers to slow down and adjust their speed accordingly. Esses are sharper turns that require more precise maneuvering and often involve changing lanes. Both types of turns require drivers to be aware of their surroundings and to drive with caution.