1A main road or arterial road that connects major areas in a city or region; usually carries heavy traffic and is used for long-distance travel and transport.
この幹線道路は朝夕のラッシュ時に非常に混雑する。
This main road gets very congested during the morning and evening rush hours.
幹線道路沿いには大型の商業施設がいくつも並んでいる。
There are many large commercial facilities lined up along the arterial road.
台風の影響で幹線道路が一部通行止めになった。
Part of the main road was closed due to the typhoon.