The safety test for 2007 has shown that numerous important tunnels in Europe are unsafe, with the biggest objections referring to fire protection and emergency exits, said ADAC.
Independent experts inspected 51 tunnels in 13 countries and every fifth one failed to meet the safety criteria, flunking the test, said ADAC.
The winner of this year's safety test is the Croatian tunnel Brinje, on Highway A1, from Zagreb to the southern seaport of Split, which meets all relevant safety criteria, said ADAC.