Speed limits in Germany
In 1973, in the wake of the 1973 oil crisis, a federal speed limit of 100 km/h (62 mph) on Autobahns was imposed to help conserve fuel for fear of impending future shortages (not for environmental or safety reasons). The measure only lasted from December 1973 to March 1974; while the administration and the Bundestag were in favor of keeping the speed limit, the Bundesrat pushed to repeal the law. As a compromise, a "recommended speed" was introduced on Autobahns and "highways outside of built-up areas with a center divide or without a center divide and a continuous lane for overtaking in both directions". This law is basically still in effect today. Unrestricted non-Autobahn highways, however, have since become virtually non-existent or replaced by "Schnellstraßen", Autobahn-like expressways typically limited to 120 or 130 km/h and normally only covering a few kilometers.
Provincial Route 2 (Buenos Aires)
According to Argentine Law 24.449 being in force at Buenos Aires Province since 2008, the maximum speed limit for cars and motorcycles in Autovía 2 is 120 km/h, with the exception of urban zones where the limit reduces to 60 km/h. For buses, the speed limit has been established at 90 km/h and trucks must go at 80 km/h.