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Bundesautobahn 9 near by Garching bei Muenchen, Germany. At the top of the hierarchy in terms of traffic flow and speed are controlled-access highways; their defining characteristic is the control of access to and from the road, meaning that the road cannot be directly accessed from properties or other roads, but only from specific connector roads.
The functional classification of a road is the class or group of roads to which the road belongs. There are three main functional classes as defined by the United States Federal Highway Administration : arterial, collector, and local.
Roads also may be classified based on their pavement material types. For instance, the Long-Term Pavement Performance database includes more than 30 types of pavement types for roads in the US and Canada. [2] [4] [5] However, a more generic classification of roads based on material type is as follows. [5] [6] Concrete roads; Asphalt roads ...
See three-way junction 5-1-1 A transportation and traffic information telephone hotline in some regions of the United States and Canada that was initially designated for road weather information. A Access road See frontage road Advisory speed limit A speed recommendation by a governing body. All-way stop or four-way stop An intersection system where traffic approaching it from all directions ...
By contrast, in many regular, traditional grid plans, as laid out, higher order roads (e.g. arterials) are connected by through streets of both lower order levels (e.g. local and collector). An ordering of roads and their classification can include several levels and finer distinctions as, for example, major and minor arterials or collectors.
A route (or road) number, designation or abbreviation is an identifying numeric (or alphanumeric) designation assigned by a highway authority to a particular stretch of roadway to distinguish it from other routes and, in many cases, also to indicate its classification (e.g. motorway, primary route, regional road, etc.), general geographical location (in zonal numbering systems) and/or ...
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The classification is denoted by the colour of the sign border and direction arrow, and can be summarised as follows: Blue - roads suitable for cars, minibuses and light goods vehicles excluding caravans; Brown - roads that are only suitable for cars and other light traffic; White - roads recommended for local traffic only