A relatively simple approach is:
1) draw the center line in the same fashion as your edges, as a solid, tapered line.
2) draw a white box that makes up the closest-to-viewer gap in the center line.
3) with the white box selected, choose the scale tool and click at the point where the lines meet at the horizon to set the scaling center point there, then scale the white box with the alt/option key held down (so as to create a copy as you scale) and let go when the copy is at the right location for the second gap
4) Press cmd/cntrl + D repeatedly (to redo last transformation) to make a sequence of white boxes receding into the horizon.
5) To clean up, select all white boxes and unite them into a single object with the pathfinder and then cut that combined shape out of the center line with another pathfinder operation (cut front object).
An alternate approach is to draw the road from a satellite view (no perspective), outline the paths, group them and then use the 3D rotate to put it in perspective. Sounds simpler, but isn’t necessarily so.
Kalleheikki Kannisto
Senior Graphic Designer