Refers to a physical transportation route: bus, train, air, etc. Used for both the path and the service designation.
This line gets crowded during the morning rush hour.
A new bus route will open next month.
Abstract use: the stance, policy, or direction taken by a group, organization, or individual. Often used in political, business, or editorial contexts.
The government is sticking to its economic reform policy.
The editorial department launched a new direction.
This line goes to Shinjuku.
Because ridership has declined, this route will be discontinued next year.
The company changed its management policy course.
The new administration put forward a reform-oriented policy line.
He is following a conservative policy line.
路線 means the transit route or line itself, whereas 路線図 is the diagram or map that shows those routes.
byungjin line; parallel advancement policy
moderate line; middle-of-the-road policy
lines in operation; routes in service · business plan; business policy
populist line; popular approach
publicity policy; propaganda line
countermeasure route; designated route to address a problem · countermeasure program; policy approach
dialogue-oriented policy; policy of dialogue over confrontation