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The first cloverleaf interchange patented in the US was by Arthur Hale, a civil engineer in Maryland, on February 29, 1916. [3] [4]A modified cloverleaf, with the adjacent ramps joined into a single two-way road, was planned in 1927 for the interchange between Lake Shore Drive and Irving Park Road in Chicago, Illinois, but a diamond interchange was built instead.
A cloverleaf interchange is a four-legged junction where left turns across opposing traffic are handled by non-directional loop ramps. [23] It is named for its appearance from above, which resembles a four-leaf clover. [21] A cloverleaf is the minimum interchange required for a four-legged system interchange.
A4 Interchange for right-hand traffic, or B4 interchange for left-hand traffic The parclo A4 (also called "six-ramp partial cloverleaf") contains six ramps. [ 2 ] On each side on the freeway, there is an (often multi-lane) exit ramp, followed by a loop ramp and directional ramp entering the freeway.
Here’s the fascinating history behind four-leaf clovers, including why they're considered lucky, why they're a symbol of Ireland, and how to find one!
The post Why Four-Leaf Clovers Are Considered Lucky appeared first on Reader's Digest. We all know carrying a four-leaf clover will bring you good fortune, but the history of this lucky symbol may ...
The first stack interchange in the world was the Four Level Interchange (renamed the Bill Keene Memorial Interchange), built in Los Angeles, California, and completed in 1949, at the junction of U.S. Route 101 and State Route 110. [3]
The shamrock carries religious ties, while the four-leaf clover is considered a sign of luck due to its exceeding rarity. In fact, around one out of 10,000 clovers have four leaves. And while ...
Cloverleaf interchange, a type of highway interchange; Toledo, St. Louis and Western Railroad, commonly called the Clover Leaf; Other uses