The Highways of North Carolina
I-840 
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I-840  10 miles (in two pieces)
The Road: Begins at I-40/85/85 Bus and ends at US 29 northeast of Greensboro; a second segment begins at I-40/73 and US 421 and ends at I-73 in Western Greensboro (all within Guilford County).
Towns and Attractions: Guilford Co.: Greensboro  
History:
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 US 220 northeast to US 220.

2011 Official
I-840 appears on both sides of Greensboro
2011 Official

Exit List:
EXIT 1: I-40, I-73 SOUTH, US 421
EXIT 2: SR 2147 W. Friendly Ave
EXIT 3: I-73 NORTH
EXIT 6: US 220
GAP IN ROUTE
EXIT 14: US 29
EXIT 17: SR 2770 Huffine Mill Rd
EXIT 18 (old 19): US 70
EXIT 21: I-40, I-85, I-85 Bus

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.

Last Update: 22 June 2018

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