Opened in 1929, the first cloverleaf interchange built in the United States was the Woodbridge Cloverleaf at intersection of the Lincoln Highway (Route 25) and Amboy—now St. Georges—Avenue (Route 4) (now U.S. 1/9 and Route 35) in Woodbridge Township, New Jersey.
The original design has since been replaced with a partial cloverleaf interchange, a modification of the original design.
Want to know more? View the 30-minute documentary, “The Woodbridge Cloverleaf: Onramps to Innovation“.