Single-point urban interchange

A single-point urban interchange (SPUI, /ˈspuːi/ SPOO-ee or /ˈspjuːi/ SPEW-ee), also called a single-point interchange (SPI) or single-point diamond interchange (SPDI), is a type of highway interchange. The design was created in order to help move large volumes of traffic through limited amounts of space efficiently.

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