I don't know if you want that kind of accurate road design, or just draw a more random landscape path? Xiangyuan is used to it. Draw the center line accurately with pl line and turn it into a double line. You can also draw that kind of random landscape path with pavement.

Draw the road accurately with cad, first draw the road center line with cad, then draw it with pl straight line (multi-segment line), and then set a radius value where the arc is to be made with the fillet command.

After the center line is completed, how wide the road is, use the offset command to shift the center line to the left and right respectively.

Spline curve spl is smooth, but it can't attach dimensions accurately. The first draft of a general road can be roughly drawn with spl, and then accurately drawn with pl, that is, pl can control the turning radius of the road, but spl can't.

This is the road I drew myself for your reference.