page_title: Interstate 684
section_title: History
hierarchical_section_title: Interstate 684 / History
caption_attribution_description: English: Aerial view of Muscoot Reservoir and Cross River Reservoir, Westchester County, New York.
context_page_description: Interstate 684 is a 28.51-mile-long north–south Interstate Highway in the state of New York in the United States. There is also a short portion in Connecticut with no junctions. The highway connects I-84 with I-287 and the Hutchinson River Parkway, primarily serving commuter traffic to and from the northern suburbs of the New York metropolitan area. Most of the route is in northern Westchester County. The route of the highway was originally designated as part of I-87 from 1968 to 1970. The first section of the roadway opened to traffic in October 1968, and the final segment was completed in December 1974.
context_section_description: An expressway along the NY 22 corridor between White Plains and Brewster was planned by Westchester County in 1956. In 1961, the proposed routing of I-87 north of Elmsford along the east bank of the Hudson River was relocated to use the NY 22 corridor instead via modern I-287 and I-84. After much controversy, the routing of I-87 was approved by the Bureau of Public Roads in December 1964. Construction began soon after the approval with the southernmost section between White Plains and Armonk (including the short section in Connecticut) opened in October 1968. The northernmost section between Purdys and Brewster opened in 1969.
  On January 1, 1970, I-87 was relocated to follow the New York State Thruway north of Elmsford. The old route was redesignated as I-684. Later that year, a third segment of the new highway between Armonk and Bedford Hills opened to traffic as well. For a time, Route 22 was a four-lane superhighway extending from Bedford Hills/Katonah to Goldens Bridge.  The final segment eventually utilized the footprint of Route 22 and the Route 22 designation was returned to "Old Route 22", a parallel local road.  The portion from Goldens Bridge to Brewster, which proved to be difficult from an engineering standpoint, was completed in December 1974.
caption: Interstate 684 wends between Muscoot Reservoir to its west and Cross River Reservoir to its east near Katonah, New York. Byram Lake Reservoir just west of I-684 at bottom. (Aerial photo, 2013).
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