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|I-840 21 miles|
|The Road:||Begins at I-40/85/85 Bus and ends at I-40/73 and US 421 and ends at Elm St in Northern Greensboro (all within Guilford County).||Towns and Attractions:||Guilford Co.: Greensboro
I-840 first appeared as a signed future interstate in 2002 when the freeway between US 70 and I-40/85 was opened. Although signed as I-840, this segment of road was technically SR 3269 until Sept 2011.
In Dec 2008 (Bob Malme's I-73 website), I-840 was signed as a future interstate from I-40/73 and US 421 north to Bryan Blvd. As with the eastern segment, this segment was not technicaly added as I-840 by NCDOT in Sept 2011 (it was given its I-73 designation by NCDOT in Feb 2009).
On December 6, 2017 (aaroads forum), I-840 was opened from US 70 northwest to US 29 (though only posted as I-785).
On April 19, 2018 (aaroads forum), I-840 was opened from I-73/Bryan Blvd northeast to US 220.
On Dec 30, 2019 (aaroads forum), I-840 was opened from US 220 to Lawndale Dr.
On Dec 23, 2020 (aaroads forum), I-840 was opened from Lawndale Dr to Elm St.
On Jan 23, 2023 (aaroads forum), I-840 was opened from Elm St. to US 29, completing the Greensboro Loop, as well as I-840.
I-840 open from US 220 to Elm St
|Comments:||The first official map to show anything assigned as I-840 was the 2009 issue.
In July 2013 (NCDOT), I-785 was officially assigned to the eastern piece of I-840, creating the second overlay in the country of two 3dis.
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