1. I opened the image and created a duplicate background copy.
2. With background copy selected in the Layers, I used the Magic Wand tool to pick the yellow lane.
3. Right click the area picked by the Magic Wand and select Layer via Copy.
4. Repeat steps 2&3 to pick the rest of the parts of the yellow lanes.
5. Adjust the saturation of the background image copy.
6. Slide the Saturation slider to the left or input -100.
That's it. ッ