Final answer:
The area of grass between the sidewalk and the road is commonly called the parkway or the tree lawn. It serves as a buffer between the road and the sidewalk and provides space for pedestrians while separating them from the traffic.
Step-by-step explanation:
The area of grass between the sidewalk and the road is commonly called the parkway or the tree lawn. It is the strip of land that often has trees, shrubs, or grass, and it serves as a buffer between the road and the sidewalk. The purpose of the parkway is to provide space for pedestrians while also separating them from the traffic on the road.