A trumpet interchange is a type of highway interchange that connects a main highway to a smaller road or access road, often in the shape of a "trumpet" with one curved ramp. This design allows vehicles to enter or exit the main highway easily, without crossing traffic, by using a simple curved ramp. Trumpet interchanges are typically used in areas where a highway meets a secondary road, helping traffic flow smoothly with minimal complexity. They are common in rural or less-developed areas with lower traffic volumes.

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