noun, noun or participle which takes 'suru', noun which may take the genitive case particle 'no'
going south; heading southward
Used for travel, movement, or orientation toward the south. Can be used as a noun, with する to mean 'to go south', or as a no-adjective.
列車は南行している。
The train is heading south.
南行のバスに乗ってください。
Please take the southbound bus.