Curb - Rounded: by separating the pavement from the road, curbs are used to prevent unwanted traffic from occurring. Further uses are to support the pavement edges and to bring a better visual to the project. 

Rounded finish strengths:

When an edge is rounded, its sharpness is removed which creates a safe solution for edges of projects. Regarding the looks of the projects, the rounded edge gives the project a softer look and is tilted towards a more natural look.