A solid white line on the right edge of the highway slants in to the left. That shows that:

A solid line along the side of the road indicates where its edge is, marking the boundary between the travel lane and the shoulder. If the edge line angles toward the center of the road, this means that the road is narrower ahead.

• There is an intersection just ahead.
• You are approaching a construction area.
• You will be required to turn left just ahead.
• The road will get narrower.