Just over half of the German autobahns have only an advisory speed limit (a "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 outside of towns which is either a dual carriageway or features at least two lanes per direction, regardless of its classification (e.g. Autobahn, Federal Highway, State Road, etc.), unless there is a speed limit posted, although it is less common for non-autobahn roads to be unrestricted. All other roads in Germany outside of towns, regardless of classification, do have a general speed limit of 100 km/h, which is usually reduced to 80 km/h at Allée-streets (roads bordered by trees or bushes on one or both sites). Travel speeds are not regularly monitored in Germany; however, a 2008 report noted that on the autobahn in Niemegk (between Leipzig and Berlin) "significantly more than 60% of road users exceed more than 30% of motorists exceed ". Measurements from the state of Brandenburg in 2006 showed average speeds of on a 6-lane section of autobahn in free-flowing conditions.