Parts of the German Autobahn do not have posted speed limits.
Yes Germany does have speed limits but on a lot of motorways they dont :)
They are not allowed to exceed speed limits
Speed limits are set by whatever level of government owns that particular roadway.
The four major speed laws typically refer to the laws that regulate speed limits on roadways. These include statutory speed limits set by laws, prima facie speed limits that allow flexibility based on conditions, fixed or regulatory speed limits posted on signs, and basic speed laws that require drivers to always operate at a safe speed regardless of posted limits.
Posted speed limits tell you what the maximum speed is on that specific road. That is the speed that you are legally able to drive on the road.
Drivers need to be consciously aware of changing speed limits and watch for posted signs in city and suburban driving environments. You would expect: A speed limits of 15 mph B speed limits of 25 mph C speed limits of 35 mph You would not expect to see D speed limits above 45 mph City driving is referred to as "start and stop" driving because traffic is either moving or stopped. Changing speed limits can make traffic slow to a crawl, such as in school zones.
Kilometers per hour. England invented the imperial measurement system (pounds and inches). However, they a mixture of that and metric today.
This depends on whether you are looking for aircraft speed limits or motor vehicle speed limits.
They are not allowed to exceed speed limits
Speed limits change for lots of reasons. Limits have changed to conserve fuel and for accident reduction.
not everywhere, but by default there is just a recommended speed (~80mph).