Traffic Island
Traffic islands are raised areas constructed within the roadway to establish physical channels through which the vehicular traffic may be guided. Traffic islands often serve more than one function.
picture from www.ci.durham.nh.us
The traffic islands may be classified based on the functions as:
Divisional islands
Divisional islands are intended to separate opposing flow of traffic in a highway with four or more lanes. By thus dividing the highway into two one way roadways, the head on collisions are eliminated and in general other accidents re also reduced. The width of the divisional islands should be large if the head light glare is to be reduced during night driving. The curb should be high enough to prevent vehicles from entering into to the islands.
Channelizing islands
Channelizing islands are used to guide the traffic into proper channels through the intersection area. Channelizing islands are very useful as traffic control devices or intersection at grade, particularly when the area is large. The size and shape of the channelizing islands will very much depend upon the layout and dimension of the intersections. Considerable professional experience and skill is required for the successfull design of channelizing islands. If the islands is not properly designed and placed, there is a possibility of violation of rules by the traffc resulting in greater hazards.
Highway and Transport Engineering
and this section is about Traffic Island
(refference : Khanna, S.K., Justo, C.E.G., Highway Engineering, 3th edition, Nem Chand & Bros Roorkee (U.P.), 1976.)
picture from www.ci.durham.nh.us
The traffic islands may be classified based on the functions as:
Divisional islands
Divisional islands are intended to separate opposing flow of traffic in a highway with four or more lanes. By thus dividing the highway into two one way roadways, the head on collisions are eliminated and in general other accidents re also reduced. The width of the divisional islands should be large if the head light glare is to be reduced during night driving. The curb should be high enough to prevent vehicles from entering into to the islands.
Channelizing islands
Channelizing islands are used to guide the traffic into proper channels through the intersection area. Channelizing islands are very useful as traffic control devices or intersection at grade, particularly when the area is large. The size and shape of the channelizing islands will very much depend upon the layout and dimension of the intersections. Considerable professional experience and skill is required for the successfull design of channelizing islands. If the islands is not properly designed and placed, there is a possibility of violation of rules by the traffc resulting in greater hazards.
Highway and Transport Engineering
and this section is about Traffic Island
(refference : Khanna, S.K., Justo, C.E.G., Highway Engineering, 3th edition, Nem Chand & Bros Roorkee (U.P.), 1976.)
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Divisional islands are intended to separate opposing flow of traffic in a highway with four or more lanes. By thus dividing the highway into two one way roadways, the head on collisions are eliminated and in general other accidents re also reduced. The width of the divisional islands should be large if the head light glare is to be reduced during night driving. The curb should be high enough to prevent vehicles from entering into to the islands.
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