Single-point urban interchange
Highway interchange design / From Wikipedia, the free encyclopedia
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This article reflects countries that drive on the right. For countries that drive on the left, reverse right and left.
A single-point urban interchange (SPUI, /ˈspuːi/ SPOO-ee or /ˈspjuːi/ SPEW-ee), also called a single-point interchange (SPI)[1] 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.