noun
autobahn; German/Austrian/Swiss expressway
Refers specifically to the high-speed highway system in Germany, Austria, and Switzerland. Not used for Japanese expressways.
from German Autobahn
ドイツのアウトバーンには速度制限がない区間がある。
There are sections of the German autobahn with no speed limit.
Generic term for expressway/highway, including Japanese ones. アウトバーン is specifically the German/Austrian/Swiss system.
Borrowed from German 'Autobahn'.