Portal:Roads

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Jalan Ampang at night, with the Petronas Twin Towers visible in the background in Kuala Lumpur, Malaysia.
Roads, defined as a path connecting two points, are generally classified into a hierarchy. At the top of the hierarchy are freeways (US) (UK: motorways), which serve entirely a function of moving vehicles between other roads. Freeways are grade-separated and limited access, have high speeds and carry heavy flows. Below freeways are arterials. These may not be grade-separated, and while access is still generally limited, it is not limited to the same extent as freeways, particularly on older roads. These serve both a movement and an access function. Next are collector/distributor roads. These serve more of an access function, allowing vehicles to access the network from origins and destinations, as well as connecting with smaller, local roads, that have only an access function, and are not intended for the movement of vehicles with neither a local origin nor destination. Local roads are designed to be low speed and carry relatively little traffic.

The design of roads is specified in a number of design manual, including the AASHTO Policy on the Geometric Design of Streets and Highways (or Green Book). Relevant concerns include the alignment of the road, its horizontal and vertical curvature, its super-elevation or banking around curves, its thickness and pavement material, its cross-slope, and its width. Fundamentals of Transportation/Geography and Networks

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Autobahn (South-Eastern Germany)
Autobahn is the German word for a major high-speed road restricted to motor vehicles capable of driving at least 60 km/h (37 mph) and having full control of access, similar to a motorway or freeway in English-speaking countries.

In most countries, it usually refers to the German autobahn specifically. The recommended speed of the German autobahn is 130 km/h (81 mph), but there is no general speed limit. Austrian and Swiss autobahns have general speed limits of 130 km/h (81 mph) and 120 km/h (75 mph), respectively. In German, the word is pronounced as described above, and its plural is Autobahnen; in English, however, the segment "auto" is typically pronounced as in other English words such as "automobile". The official name of the autobahn in Germany is Bundesautobahn (BAB) (Federal Freeway). Autobahns are built and maintained by the federal government (as are the federal highways), thus the name "Federal Freeway". The first were built in the 1920s, and in the 1930s the official name was "Reichsautobahn" (Freeways of the Reich).

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The Cross-Harbour Tunnel is the first tunnel in Hong Kong built underwater beneath the Victoria Harbour.
Credit: (WiNG)

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...that cross-country cyclists are more prone to injury than road cyclists but the injuries sustained by the former are less severe on average?
... that a 25-foot (7.6 m) tall, traditionally-dressed Ukrainian woman offers bread and salt to Saskatchewan Highway 5 travelers at Canora, a town in Saskatchewan, Canada?

...that famous tenor Antonio Giuglini used to jaywalk through traffic on London's Brompton Road while flying his kite?

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A view of the Tidel Park junction on Rajiv Gandhi Salai, Chennai. The Thiruvanmiyur station on the Chennai MRTS can be seen on the left.
Credit: (PlaneMad)

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  • Improve: You may always improve the quality of road articles by adding more information and references to enhance the overall readers' experience. Improvements to GA and FA quality is much appreciated! Also, nominations for Selected article and Selected picture are always needed, as with Did you know and News. Add to the Portal
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  1. ^ "Saskatchewan's Global Transportation Hub". About Highways/Transportation Hub/. Government of Saskatchewan. Retrieved 2009-02-09. 
  2. ^ Police don't know what prompted vicious bus attack, CTV.ca, July 31, 2008. Accessed August 6, 2008.