A method and system for representing multiple road properties with a single multi-dimensional parametric spline curve is disclosed. A B-Spline is generated to represent a first road dimension. The B-Spline is written mathematically in vector format. One or more road dimensions to be added to the B-Spline are selected. Depending on the selection, the road dimensions are created in a format compatible with the B-Spline. For example, the road dimensions may be created using curve fitting, B-Spline merger, or direct assignment. Once the road dimensions are created, they are added to the original B-Spline vector. The new B-Spline vector is then stored in a data storage unit for use by systems, such as Advanced Driver Assistance Systems.