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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.
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Some noteworthy AASHTO publications are: [9] A Policy on Geometric Design of Highways and Streets, often called "The Green Book" because of the color of its cover.This book covers the functional design of roads and highways including such things as the layout of intersections, horizontal curves, and vertical curves.
In parclo A2, the loop ramps serve as on-ramps and the directional ramps serve as off-ramps. In parclo B2 the roles are reversed. Both on- and off-ramps require controlled intersections at the arterial road (sometimes loop and directional ramps from the same side of the freeway will utilize the same intersection).
An unused highway is a highway or highway ramp that was partially or fully constructed, but went unused or was later closed or part of a future expansion. An unused roadway or ramp may often be referred to as an abandoned road, ghost road, highway to nowhere, stub ramp, ghost ramp, ski jump, stub street, stub-out, or simply stub. [2]
A directional interchange is a grade separated junction between two roads where all turns that require crossing over or under the opposite road's lanes of travel to complete the turn utilize ramps that make a direct or semi-direct connection. The difference between direct and semi-direct connections is how much the motorist deviates from the ...
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Shopping districts and streets in the United States (8 C, 100 P) Pages in category "Streets in the United States" The following 8 pages are in this category, out of 8 total.