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Diverging Diamond interchange

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Diverging Diamond Interchange
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A Diverging Diamond Interchange (DDI) is a compact and relatively low-cost Grade Separated Junction. It differs from a sandard Diamond interchange because the minor road's carriageways cross.

The junction type was first seen in France in the 1970s, with many examples being added in the United States from the 2000s onwards. There are no current known examples in the UK or Ireland.

The traffic is controlled by a two phase design, meaning it is relatively efficient at moving traffic through the interchange.


Diverging Diamond Variants

Some variants to the design exist, with additional sliproads being added to improve traffic flows.





Diverging Diamond interchange
Junction Types
Cloverleaf • Crossroads • Diamond • Directional T • Diverging Diamond • Dumbbell • Fiveways • Four Level Stack • Grade separated • Gyratory • Hamburger Junction • LILO • Longabout • Magic Gyratory • Magic Roundabout • Parclo • Roundabout • Roundabout interchange • Single Point Urban Interchange • Single sliproad junction • T Junction • Trumpet Junction • Whirlpool


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