Texas State Highway 121

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State Highway 121 marker

State Highway 121
Route information
Maintained by TxDOT
Length: 85.563 mi[1] (137.700 km)
Existed: by 1939 – present
Major junctions
Southwest end: I-35W / US 287 / US 377 / Spur 347 in Fort Worth

I-820 from Richland Hills to North Richland Hills
I-635 in Grapevine
I-35E / US 77 in Lewisville
Dallas North Tollway in Plano
US 75 from McKinney to Melissa
US 69 in Trenton

US 82 in Bonham
Northeast end: SH 78 in Bonham
Highway system
SH 120 SH 122

State Highway 121 is a state highway angling from southwest to northeast through north central Texas. It runs from downtown Fort Worth, Texas at the junction of Interstate 35W to Bonham, Texas, just north of a junction with U.S. Highway 82.

Between Fort Worth and Euless, SH 121 is known as Airport Freeway (east of Euless, this name applies to SH 183). East of Coppell, the highway acts as the frontage road of the Sam Rayburn Tollway, a tolled freeway that runs northeast to McKinney. From McKinney to Melissa, the state highway is concurrent with US 75 and the North Central Expressway. Northeast of Melissa, SH 121 is a smaller roadway referred to in some places as the Sam Rayburn Highway.

Route description[edit]

SH 121 Business west from IH-35E towards Grapevine

Sections between downtown Fort Worth and Grapevine are freeway, including a small segment near Hurst that coincides with Interstate 820. At Bedford, Texas it has an interchange with SH 183, the Irving freeway that leads toward Dallas; it has an interchange with SH 360, which leads toward Arlington, just to the west of the north entrance to the Dallas/Fort Worth International Airport, to which State Highway 121 gives access. At Grapevine it has interchanges with SH 114 and Interstate 635 before becoming a limited-access tollway that passes between Lewisville and Frisco.

It is very heavily traveled south and west of McKinney and has become an urban highway due to the rapid growth of the Dallas–Fort Worth metroplex. Service roads extending southwest to northeast along the corridor from Lewisville to McKinney are free of charge; however the main lanes within the right-of-way are tolled as part of the Sam Rayburn Tollway operated by the North Texas Tollway Authority (NTTA). The highway's northeastern section between Melissa and Bonham carries less traffic and until recently was a two-lane rural highway. However, in recent years with an increase in traffic, the 19 mile section between the Collin-Fannin County line and its junction with SH 56 in Bonham has been upgraded to a "Super Two" highway system. This allows for alternating passing lanes. Beginning in 2016, the segment between Melissa and the Collin-Fannin County line is being upgraded to a four-lane divided highway system. In addition, a two mile stretch between SH 56 and US 82 within Bonham city limits, was upgraded to a four-lane highway system with a continuous left-hand turn lane. Long term planning calls for upgrading the 19 mile stretch, from the Collin-Fannin County line to SH 56 in Bonham, into a four-lane divided highway system.

It meets Interstate 35E at Lewisville, SH 289 near Frisco, US 75 and US 380 in McKinney, US 69 at Trenton, and SH 78 just north of Bonham.

Construction began in 2009 on the extension of 121 south from Fort Worth to Cleburne, as a toll road called Southwest Parkway in Tarrant County and Chisholm Trail Parkway in Johnson County. This section will be operated by the NTTA and the entire project, from IH 30 to U.S. 67 is expected to open to traffic in the fourth quarter of 2013.[2]

In March, 2009, work was completed on the eventual southbound lanes on a short stretch of 121 northeast of DFW Airport, which currently shares southbound and northbound traffic. This work upgraded two signalized at-grade intersections to a freeway, with overpasses at both intersections, improving traffic in that area.[3] The northbound freeway lanes are currently under construction, which also include new, separate exits and entrances for Freeport Parkway and Grapevine Mills Boulevard/Sandy Lake Road.

Interchange between SH 121 and SH 121 Business Route

Sam Rayburn Tollway[edit]

From McKinney to Coppell, State Highway 121 acts as a frontage road to Sam Rayburn Tollway, contrary to the popular misconception that the Sam Rayburn Tollway was the new SH 121.


In early 2007, the Spanish firm Cintra agreed to a $2.8 billion, 50-year deal where they would lease the highway from TxDOT, finish building and maintain it, and collect the tolls. [4] However, critics of the deal questioned both its length—the contract allowed Cintra to collect tolls for 50 years—and the fact that the North Texas Tollway Authority (NTTA) was prevented from bidding on the contract. In addition, general opposition to the toll plan organized, pointing out that the segment through Denton County had already been paid for by taxpayer money.[5]

To answer some of these complaints, Texas legislators pressed the Texas Department of Transportation to allow the NTTA to bid.[6] The Authority announced their proposed bid in early May 2007, which would provide approximately $3.3 billion in road funding, but is based on traffic counts that differ from those used by Cintra.[7]

On June 28, 2007, the Texas Transportation Commission announced it would pursue the proposal from the North Texas Tollway Authority (NTTA).[8]

Route history[edit]

SH 121 was originally numbered in 1928 as a direct routing between Fort Worth and McKinney. By 1933, the route had been completed from Ft. Worth northeast through Grapevine to its intersection with U.S. Route 77 in far southern Denton County. In 1943, the ambitious plan to extend SH 121 northeast to Bonham was approved by TXDOT, a part of which absorbed Farm to Market Road 82 between Bonham and Randolph. But it wasn't until 1954 that the next section of this highway was completed between U.S. 77 at Lewisville and U.S. Route 75 near McKinney. The final section between McKinney and Trenton was not completed until 1964, including an extension around the western side of Bonham. In 1965, the section from downtown Fort Worth to Interstate 820 was transferred to newly completed freeway sections.

Major intersections[edit]

County Location mi[9] km Destinations Notes
Tarrant Fort Worth 0.0 0.0 I-35W / US 287 / US 377 south – Waco, Denton
Spur 347 west (Belknap Street) – Downtown Fort Worth
I-35W exit 52B, access to Fort Worth Intermodal Transportation Center
0.8 1.3 Sylvania Avenue
1.2 1.9 Riverside Drive
2.1 3.4 Beach Street
2.7 4.3 Maxine Street Northbound exit and southbound entrance
Haltom City 3.1 5.0 Haltom Road
4.2 6.8 Carson Street
4.9 7.9 Minnis Drive
Richland Hills 6.4 10.3 Handley-Ederville Road Access to Richland Hills Station
Hurst 7.3 11.7 I-820 south south end of I-820 overlap; SH 121 south follows exit 24B
SH 10 east / SH 183 west – Richland Hills south end of SH 183 overlap; I-820 exit 24A
8.4 13.5 Pipeline Road / Glenview Drive I-820 exit 23, access to North Hills Hospital

SH 121 Express north / SH 183 Express east to FM 157
northbound exit and southbound entrance; I-820 exit 23A
8.5 13.7 SH 26 / FM 1938 north (Davis Boulevard) / Bedford-Euless Road – Colleyville, TCC Northeast Campus I-820 exit 22B
8.9 14.3 I-820 west north end of I-820 overlap; SH 121 north follows exit 22A
10.1 16.3 FM 3029 north (Precinct Line Road) / Hurstview Drive
HurstBedford line 11.5 18.5 Norwood Drive / Brown Trail
Bedford 12.5 20.1 Bedford Road / Forest Ridge Drive
13.0 20.9 Central Drive / Forest Ridge Drive Access to Texas Health HEB
13.6 21.9 SH 183 east – DFW Airport South Entry, Irving north end of SH 183 overlap; no direct southbound exit (signed at Murphy Drive)
14.0 22.5 Westpark Way / Murphy Drive
15.0 24.1 Harwood Road

SH 121 Express south / SH 183 Express west to I-820
southbound exit and northbound entrance
BedfordEuless line 16.7 26.9 FM 157 south / Cheek-Sparger Road
EulessGrapevine line 17.2 27.7 Glade Road
Grapevine 18.1 29.1 Hall-Johnson Road
18.7 30.1 To SH 360 / Stone Myers Parkway Northbound exit and southbound entrance
19.3 31.1 SH 360 south – Arlington Southbound exit and northbound entrance
20.8 33.5 SH 114 west (SH 26 south) to FM 1709 / William D. Tate Avenue – Bridgeport south end of SH 114 overlap
21.9 35.2
SH 26 north / Bus. SH 114 west (Texan Trail) / Main Street – Grapevine Historic District
no northbound entrance
22.4 36.0 SH 114 east – Dallas North end of SH 114 overlap
22.9 36.9 DFW Airport (International Parkway)
24.3 39.1 I-635 east I-635 exit 36
24.7 39.8 Bass Pro Drive / Bethel Road / Grapevine Mills Trail
25.3 40.7 FM 2499 north (Grapevine Mills Parkway) – Flower Mound northbound exit and southbound entrance, access to Grapevine Mills Mall
Dallas CoppellGrapevine line 26.2 42.2 Grapevine Mills Boulevard / Sandy Lake Road / Freeport Parkway
Denton Lewisville 27.6 44.4
Bus. SH 121 north – Lewisville
Dallas CoppellLewisville line 28.8 46.3 Sam Rayburn Tollway north / Denton Tap Road – McKinney north end of freeway
Denton Lewisville 30.0 48.3 Sam Rayburn Tollway / MacArthur Boulevard
31.1 50.1 Sam Rayburn Tollway south / I-35E (US 77) – Denton, Dallas, D/FW Airport, Fort Worth south end of Sam Rayburn Tollway overlap; south end of freeway; I-35E exits 447A-447B-448A
Carrollton 32.3 52.0 Marchant Boulevard / Huffines Boulevard
33.2 53.4 Sam Rayburn Tollway north / Hebron Parkway north end of Sam Rayburn Tollway overlap; north end of freeway
34.3 55.2 Sam Rayburn Tollway / Carrollton Parkway
Lewisville 35.1 56.5 Sam Rayburn Tollway south / FM 544
35.7 57.5
Sam Rayburn Tollway / Bus. SH 121 south / FM 2281 south – Lewisville
36.6 58.9 Sam Rayburn Tollway / Standridge Drive / Castle Hills Drive
36.9 59.4 Sam Rayburn Tollway / FM 423 north (Main Street) / Josey Lane – Little Elm
The Colony 38.3 61.6 Sam Rayburn Tollway / Paige Road / Plano Parkway
Sam Rayburn Tollway south southbound exit and northbound entrance
39.9 64.2 Sam Rayburn Tollway / Spring Creek Parkway
Collin PlanoFrisco line 40.7 65.5 Sam Rayburn Tollway / Legacy Drive
41.7 67.1 To Dallas North Tollway / Dallas Parkway
Sam Rayburn Tollway / Parkwood Boulevard
42.8 68.9 Sam Rayburn Tollway north / Dallas North Tollway / SH 289 (Preston Road)
Sam Rayburn Tollway / Ohio Drive interchange
43.9 70.7 Sam Rayburn Tollway north / Hillcrest Road / Rasor Boulevard
45.2 72.7 Sam Rayburn Tollway / Coit Road
46.3 74.5 Sam Rayburn Tollway / Independence Parkway
AllenMcKinney quadripoint
47.2 76.0 Sam Rayburn Tollway south / FM 2478 north (Custer Road)
AllenMcKinney line 48.1 77.4 Sam Rayburn Tollway / Exchange Parkway
49.0 78.9 Sam Rayburn Tollway north / Alma Drive
50.0 80.5 Sam Rayburn Tollway / Stacy Road
50.8 81.8 Sam Rayburn Tollway / Watters Road / Lake Forest Drive
51.8 83.4 Sam Rayburn Tollway / Chelsea Boulevard / Hardin Boulevard
52.9 85.1 US 75 south to SH 5 (via Spur 399 east) – Dallas south end of US 75 overlap; SH 121 south follows exit 39
see US 75
Melissa 61.2 98.5 US 75 north – Sherman north end of US 75 overlap; SH 121 north follows exit 45
SH 5 south south end of SH 5 overlap
62.2 100.1 SH 5 north – Melissa, Anna Interchange; north end of SH 5 overlap
63.7 102.5 FM 545 (East Melissa Road) – Melissa, Blue Ridge
64.9 104.4 FM 2933 south – New Hope
Anna Outer Loop Road
FM 455 west – Anna south end of FM 455 overlap
FM 455 east to FM 2862 north end of FM 455 overlap
71.6 115.2 FM 2862 – Westminster
Desert 75.4 121.3 SH 160 – Whitewright, Blue Ridge
Fannin Trenton FM 814 west south end of FM 814 overlap
FM 814 east – Trenton north end of FM 814 overlap
80.7 129.9
US 69 / Bus. US 69 – Whitewright, Leonard
86.0 138.4
Bus. SH 121 north
86.5 139.2 SH 11 – Sherman, Commerce Interchange
87.7 141.1
Bus. SH 121 south – Randolph
90.5 145.6 FM 1629 east – Edhube
93.0 149.7 Spur 311 north to SH 56 west – Sherman, Sam Rayburn House
Bonham 93.7 150.8 SH 56 west – Sherman South end of SH 56 overlap
94.2 151.6 SH 56 east – Bonham, Sam Rayburn Library North end of SH 56 overlap
96.1 154.7 US 82 – Sherman, Paris US 82 exit 670
96.9 155.9 FM 898 west – Ector
98.3 158.2 SH 78 – Durant, Bonham
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Business routes[edit]


Business State Highway 121-D
Location: Randolph
Length: 1.734 mi[10] (2.791 km)
Existed: 1990[10]–present

Business State Highway 121-D (Bus. SH 121-D) is a business route of SH 121 that serves the town of Randolph. The highway was designated in 1990 with the mileage being transferred from Loop 451.[11]

Bus. SH 121-D begins at an intersection with SH 121 and travels northeast before intersecting with FM 896. After intersecting with FM 896, the highway runs north and has a brief overlap with SH 11 through the town. After leaving the concurrency with SH 11, Bus. SH 121-D runs north and northeast before ending at an intersection with SH 121.

Junction list

The entire route is in Fannin County.

Location mi[12] km Destinations Notes
0.0 0.0 SH 121
Randolph 0.5 0.80 FM 896 south – Leonard
0.6 0.97 SH 11 west – Whitewright, Bonham South end of SH 11 overlap
0.7 1.1 SH 11 east – Bailey North end of SH 11 overlap
1.7 2.7 SH 121
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


Business State Highway 121-H
Location: Dallas and Denton counties
Length: 8.486 mi[13] (13.657 km)
Existed: 1999[13]–present

Business State Highway 121-H (Bus. SH 121-H) is a business route of SH 121 that serves the town of Lewisville. The highway was designated in 1999 when SH 121 was re-routed around the city.

Bus. SH 121-H begins at an interchange with SH 121/Sam Rayburn Tollway in Coppell. The highway runs northeast through industrial areas of Lewisville and turns to the north at an interchange with FM 3040 (Round Grove Road)/Denton Tap Road. Bus. North of here, SH 121-H runs by many residential areas before meeting I-35E. North of I-35E, the highway runs just south of the city's central business district and turns in a northeast direction. At Main Street, Bus. SH 121-H turns in a more eastern direction and crosses over the Elm Fork Trinity River. The highway continues to run east and meets FM 544 at an intersection before ending at an interchange with SH 121/Sam Rayburn Tollway.

Junction list
County Location mi[14] km Destinations Notes
Dallas Coppell 0.0 0.0 SH 121 / Sam Rayburn Tollway north Interchange
Denton Lewisville 1.0 1.6 FM 3040 (Round Grove Road) / Denton Tap Road Interchange
3.3 5.3 I-35E (Stemmons Freeway) I-35E exit 450
4.5 7.2 Main Street Former FM 1171
5.7 9.2 Bridge over the Elm Fork Trinity River
7.7 12.4 FM 544 east – Carrollton
8.4 13.5 SH 121 / Sam Rayburn Tollway north Interchange
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ Transportation Planning and Programming Division (n.d.). "State Highway No. 121". Highway Designation Files. Texas Department of Transportation. Retrieved 2010-06-15. 
  2. ^ http://www.ntta.org/NR/rdonlyres/3FFA8F0C-1525-445F-A169-8B47A341B396/0/NTTA_SWPCT_Brief.pdf", Southwest Parkway/Chisholm Trail Project Status Report March 2009 from the NTTA.
  3. ^ http://www.wfaa.com/video/?z=y&nvid=344241 "Overpasses give non-stop route between Frisco and D/FW", WFAA-TV report, March 20, 2009.
  4. ^ [1]
  5. ^ [2]
  6. ^ [3]
  7. ^ [4]
  8. ^ [5]
  9. ^ Google (September 30, 2013). "SH 121" (Map). Google Maps. Google. Retrieved September 30, 2013. 
  10. ^ a b Transportation Planning and Programming Division (n.d.). "Business State Highway No. 121-D". Highway Designation Files. Texas Department of Transportation. Retrieved July 11, 2017. 
  11. ^ Transportation Planning and Programming Division (n.d.). "State Highway Loop No. 451". Highway Designation Files. Texas Department of Transportation. Retrieved July 11, 2017. 
  12. ^ Google (July 11, 2017). "Overview Map of Bus. SH 121-D" (Map). Google Maps. Google. Retrieved July 11, 2017. 
  13. ^ a b Transportation Planning and Programming Division (n.d.). "Business State Highway No. 121-H". Highway Designation Files. Texas Department of Transportation. Retrieved July 11, 2017. 
  14. ^ Google (July 11, 2017). "Overview Map of Bus. SH 121-H" (Map). Google Maps. Google. Retrieved July 11, 2017. 

External links[edit]