History:
On September 22, 1953, the first four-level (or “stack”) interchange in the world opens in Los Angeles, California, at the intersection of the Harbor, Hollywood, Pasadena, and Santa Ana freeways. It was, as The Saturday Evening Post wrote, “a mad motorist’s dream”: 32 lanes of traffic weaving in eight directions at once. Before the L.A. four-level was built, American highway interchanges typically took the form of a cloverleaf, with four circular ramps designed to let motorists merge from one road to another without braking. But cloverleafs were dangerous, because people merging onto the highway and people merging off of the highway had to jockey for space in the same lane.
Since that time, many highways now have stacked interchanges to ease traffic situations. Hw comfortable are you driving on them? Or do you find cloverleafs easier to navigate? Or do look for alternate routes completely?
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