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.
Bundesautobahn 61
The section between the junctions "Wanlo" and "Jackerath" was upgraded to three lanes in 2005. The speed limit there is 130 km/h, paid for by RWE Power that in return received permission to close a section of A 44 for their Garzweiler surface mining operation. By 2017, the A 44 will be restored and the Wanlo-Jackerath-section of the A 61 will be closed instead.