Interstate 840 (Tennessee)

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Interstate 840 marker

Interstate 840
Tennessee National Guard Parkway
Route information
Maintained by TDOT
Length: 77.28 mi[1] (124.37 km)
Existed: August 12, 2016 – present
Major junctions
West end: I-40 near Dickson
East end: I-40 near Lebanon
Counties: Dickson, Hickman, Williamson, Rutherford, Wilson
Highway system
US 641 SR 1

Interstate 840 (I-840), formerly State Route 840 (SR 840), also designated as Tennessee National Guard Parkway,[2] is a loop interstate highway around Nashville, Tennessee, built by the Tennessee Department of Transportation (TDOT). First proposed by former Governor Lamar Alexander as part of a system of Bicentennial Parkways, construction began in 1991 and was completed in 2012. The freeway is 77.28 miles (124.37 km) long,[1] and it serves the cities of Lebanon, Murfreesboro, Franklin, and Dickson.[3][4]

In 2015, approval was given by the Federal Highway Administration (FHWA) and the American Association of State Highway and Transportation Officials (AASHTO) to redesignate SR 840 as Interstate 840 (I-840) as part of its integration into the Interstate Highway System. On August 12, 2016, TDOT announced that it would begin re-signing the route on August 14 and that work would be complete later in the year.


State Route 840
Location: DicksonLebanon, TN
Length: 77.28 mi[1] (124.37 km)
Existed: 1991–2016

The SR 840 project was initiated in 1986 with the passage of the Better Roads Program in the Tennessee legislature.[2] While initially referred to as Interstate 840 (I-840) in the state plan,[2] the highway was constructed entirely with state transportation funds and is officially referred to as a state route.[5] The first contract for construction was signed in 1991, and work progressed in stages. The section of road between I-40 at Lebanon and I-24 near Murfreesboro was completed in November 1996, between I-24 and I-65 near Franklin in October 2001, and between I-40 near Dickson and SR 100 in December 2002.[2][6] Due to high costs and environmental concerns, the proposed northern half of SR 840 was indefinitely placed on hold in 2003.[2] As work moved into Williamson County, residents filed complaints and eventually lawsuits in an effort to have TDOT address both environmental and aesthetic issues, considerably slowing work in that county.[5] The full southern route of SR 840 was opened on November 2, 2012.[2] The project took 25 years to complete at a cost of $753.4 million.[5]

Northern loop[edit]

Plans to construct a northern loop of I-840 north of Nashville and past Dickson, Clarksville, Springfield, and Gallatin were abandoned since the Tennessee General Assembly ordered TDOT to discontinue further studies and planning of that highway because of state budget problems. An entire circular loop would possibly be about 178 miles (286.5 km) long. Other important objections against additional extensions of the I-840 highway include the hilly nature of the terrain north of Nashville (the Highland Rim), which would require huge and costly amounts of excavation, soil relocation, and bridge construction. In October 2003, TDOT placed the northern loop plan on indefinite hold, citing a lack of documented transportation needs and lack of participation from local politicians.[1]


In 2015, TDOT submitted a request to AASHTO to redesignate SR 840 as I-840. Though the application had an error that required TDOT to refile it, AASHTO conditionally approved it and submitted it to the FHWA for their approval.[7][8] FHWA approved the change on July 22, 2015, and AASHTO finalized their approval on September 25, 2015.[9] TDOT announced that it would start replacing the signs to change over the designation the week of August 14, 2016, and that the project would be completed by the end of the year at a cost of $230,000.[10]

Exit list[edit]

County Location mi[4] km Exit Destinations Notes
Dickson 0.0 0.0 0 I-40 – Nashville, Memphis Signed as exits 0A (west) and 0B (east); I-40 exit 176
No major junctions
Williamson 7.3 11.7 7 SR 100 / SR 46 – Fairview, Centerville
14.1 22.7 14 SR 46 (Pinewood Road) – Leiper's Fork
22.9 36.9 23 SR 246 (Carters Creek Pike)
Thompson's Station 28.3 45.5 28 US 31 (Columbia Pike) / SR 6 – Columbia, Spring Hill, Franklin
30.3 48.8 30 US 431 / SR 106 (Lewisburg Pike) – Franklin, Lewisburg
31.1 50.1 31 I-65 – Nashville, Huntsville, AL Signed as exits 31A (south) and 31B (north); I-65 exit 59
34.9 56.2 34 Peytonsville–Trinity Road
37.1 59.7 37 Arno Road
Triune 41.9 67.4 42 US 31A / US 41A / SR 11 (Horton Highway) – Shelbyville, Lewisburg, Triune, Nolensville, Eagleville, Chapel Hill
Rutherford 46.9 75.5 47 SR 102 (Almaville Road) – Smyrna
50.8 81.8 50 Veterans Parkway – Blackman
Murfreesboro 53.1 85.5 53 I-24 – Nashville, Chattanooga Signed as exits 53A (east) and 53B (west); I-24 exit 74
55.1 88.7 55 US 41 / US 70S / SR 1 (NW Broad Street / New Nashville Highway) – Murfreesboro, Smyrna Signed as exits 55A (south/east) and 55B (north/west)
57.8 93.0 57 Sulphur Springs Road
61.4 98.8 61 SR 266 (West Jefferson Pike) – Smyrna
65.2 104.9 65 SR 452 (Bill France Boulevard / Maddox Road / Mona Road) – Nashville Superspeedway
Wilson 67.2 108.1 67 Couchville Pike Exit to Cedars of Lebanon State Park
70.6 113.6 70 Stewarts Ferry Pike – Gladeville
72.0 115.9 72 SR 265 (Central Pike) to SR 109 north Signed as 72A (east) and 72B (west) eastbound
76.8 123.6 76 I-40 – Nashville, Knoxville, Lebanon Signed as exits 76A (east) and 76B (west); I-40 exit 235
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also[edit]


  1. ^ a b c d Tennessee Department of Transportation (October 31, 2003). "TDOT Announces Decision on State Route 840 North" (PDF) (Press release). Tennessee Department of Transportation. Archived from the original (PDF) on November 27, 2007. Retrieved July 17, 2007. 
  2. ^ a b c d e f Tennessee Department of Transportation (2012). State Route 840: Enjoy the Ride (PDF) (Dedication program). Tennessee Department of Transportation. Archived from the original (PDF) on November 19, 2012. Retrieved June 12, 2015. 
  3. ^ Tennessee Department of Transportation (2014). Tennessee: 2014 Official Transportation Map (Map). c. 1:633,600. Nashville: Tennessee Department of Transportation. §§ C7–B8. 
  4. ^ a b Google (June 20, 2015). "State Route 840" (Map). Google Maps. Google. Retrieved June 20, 2015. 
  5. ^ a b c Anderson, Skip (November 5, 2012). "State Route 840 Opening Ends Arduous, Laborious and Costly Project". The City Paper. Nashville, TN. Retrieved June 11, 2015. 
  6. ^ Tennessee Department of Transportation (n.d.). "SR 840 South: Brief History". Tennessee Department of Transportation. Archived from the original on July 14, 2007. 
  7. ^ Vitale, Marty (May 14, 2015). "Special Committee on U.S. Route Numbering Spring 2015 Report to the Standing Committee on Highways" (PDF) (Report). Cheyenne, WY: American Association of State Highway and Transportation Officials. p. 6. Retrieved June 6, 2015. 
  8. ^ Wright, Bud (June 4, 2015). "Interstate Applications for I-840 TN" (PDF) (Letter). Letter to Greg Nadeau. Washington, DC: American Association of State Highway and Transportation Officials. Retrieved June 6, 2015. 
  9. ^ Vitale, Marty (September 25, 2015). "Special Committee on U.S. Route Numbering Report to the Standing Committee on Highways" (PDF) (Report). Chicago, IL: American Association of State Highway and Transportation Officials. p. 1. Retrieved December 18, 2015. 
  10. ^ Tennessee Department of Transportation (August 12, 2016). "Tennessee Adds New 77 Miles of Highway to Interstate System: State Route 840 Now Designated as Interstate 840" (Press release). Tennessee Department of Transportation. Retrieved August 12, 2016. 

External links[edit]

Route map: Bing / Google

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