Chicago's new elevated park (+bike path) -- which has been dubbed "the 606" -- recently opened up, giving residents of the Windy City access to an alternative to New York City's High Line elevated park.
The new 2.7-mile elevated park opened a few weeks ago on June 6, 2015 -- which means that enough time has gone by now for success to be declared! As a non-resident of Chicago, I admit that I'm a bit jealous -- it's too bad more cities don't create offerings such as this.
Given the initial rush (by both pedestrians and bicyclists) to use the new elevated park, perhaps that'll end up being the case? Word of success travels, does it not? (Perhaps I'm doing my part here.)
While I don't bike much myself, the 606 is apparently designed largely with bikers in mind, being "as much a highway for bikes as anything else, due in part to its having been largely funded through the US Department of Transportation’s Congestion Mitigation and Air Quality (CMAQ) improvement program."
Those who don't live in the area but are interested in checking it out are recommended to watch this video (showcasing the entire length of the 606) made by Steven Vance over at Streetsblog Chicago.