noun
Refers to the painted line dividing a road into lanes. Often used in traffic contexts.
中央線をはみ出して走ってはいけません。
You must not drive over the center line.
noun
Chūō Line (Tokyo railway)
Proper noun referring to the JR East Chūō Line, a major commuter and long-distance railway line in Tokyo.
中央線で新宿まで行きます。
I go to Shinjuku on the Chūō Line.