1.
route; course; way
A physical path or route from one place to another.
2.
course of action; roadmap; line of reasoning
Figuratively, the logical steps or process leading toward a goal or conclusion. Common in discussions of plans, policies, and arguments.
Usage
The figurative use of 道筋 (course of action, reasoning) is more common than the literal use in modern Japanese. It often appears in news and political discussions.