What German road system famously has no federal speed limit?
Speed limit regarding temperature, skid resistance, and average motorist speed to determine the most effective speed limit for the area before presenting the limit on the sign. This speed zone is scheduled to be activated November 2016. Just over half of the German autobahns have only an advisory speed limit (called in German "Richtgeschwindigkeit"), 15% have temporary speed limits due to weather or traffic conditions and 33% have permanent speed limits, according to 2008 estimates. The advisory speed limit applies to any road in Germany, regardless of its classification (e.g. Autobahn, Federal Highway, State Road etc.), outside of towns which is either
Speed limit that had been in place since 2008. This Variable Speed Limit system has been proved to be effective in terms of reducing crash frequency and road closures. Similarly, Interstate 90 at Snoqualmie Pass and other mountain passes in Washington State variable speed limits are used to slow traffic in severe winter weather. As a response to fog-induced chain-reaction collisions involving 99 vehicles in 1990, a variable speed limit system covering of Interstate 75 in Tennessee was implemented in fog-prone areas around the Hiwassee River. A variable speed limit was introduced on part of Britain's M25 motorway in 1995 (on the