Citations:
1995 Karl Cates Deseret News (Utah) (Nov. 30) “Life in the Slow Lane” p. A23: SPUI uses only 2 traffic signals where 4 were previously needed. North and southbound vehicles enter simultaneously. Vehicles also exit to cross street together. 2001 Michael Squires Las Vegas Review-Journal (Nev.) (2001) “Planners say SPUI on Cloverleafs” p. 2B: To increase capacity and avoid such problems, engineers have created a variation on the diamond design known as a single-point urban interchange, or SPUI (pronounced spew-ee).