southbound
adjective, adverb uk/ˈsaʊθ.baʊnd/ us/ˈsaʊθ.baʊnd/
南行（的）;向南（的）
going or leading towards the south
southbound passengers/traffic 南行乘客／车辆
Traffic is bad on the M6 southbound, after junction 11. M6高速公路南行段在11号出口后拥堵。
Traffic is bad on the 405 freeway. 405号高速公路上发生拥堵。
Compare: southward adjective