Multiple choice general knowledge culture The ‘Autobahn’ is the first interstate highway built in the world largest highway network in the world German rail network, known for its high speed electric trains Metro rail system running through the country Reveal answer Fill a bubble to check yourself A Correct answer Explanation The German Autobahn, begun in the 1920s, was the world's first interstate highway system. It is not a rail network - the German high-speed rail network is called the DB (Deutsche Bahn).