countermeasure route; designated route to address a problem
Used in transportation contexts (railway, bus, highway) for a route planned or designated to solve a specific issue, such as congestion or safety.
A new countermeasure route was established to alleviate congestion.
countermeasure program; policy approach
Refers to a planned program or policy line designed to address a problem, often used in governmental or organizational contexts.
The government announced a countermeasure program for the declining birthrate.
対策 is a general term for countermeasures or measures; 対策路線 specifies a route or program line designed as a countermeasure.
路線 alone means a route or line (transportation) or a policy line; 対策路線 combines it with a problem-solving purpose.
Compound of 対策 (countermeasure) and 路線 (route, line). The term is a straightforward combination of its components.