Texas State Highway 121
|Length:||85.563 mi (137.700 km)|
|Existed:||by 1939 – present|
|Southwest end:||I-35W / US 287 / US 377 / Spur 347 in Fort Worth|
|US 82 in Bonham|
|Northeast end:||SH 78 in Bonham|
State Highway 121, locally known as the 121 as well as other local names, is a diagonal 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 the Airport Freeway (east of Euless, this name applies to SH 183). From Grapevine and Coppell, it is known as the International Parkway. 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 multiplexed with US 75 and the North Central Expressway. Northeast of here, SH 121 is a smaller road referred to in some places as the Sam Rayburn Highway.
Sections between downtown Fort Worth and Grapevine, Texas are freeway, including a small segment near Hurst, Texas that coincides with Interstate 820. At Bedford, Texas it has an interchange with State Highway 183, the Irving freeway that leads toward Dallas; it has an interchange with State Highway 360, which leads toward Arlington, Texas, 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 State Highway 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 half is primarily two lanes wide and carries significantly less traffic.
It meets Interstate 35E at Lewisville, Texas, State Highway 289 near Frisco, Texas, U.S. Highway 75 and U.S. Highway 380 in McKinney, Texas, U.S. Highway 69 at Trenton, Texas, and State Highway 78 just north of Bonham.
Construction began in 2009 on the extension of 121 south from Fort Worth to Cleburne, Texas, as a toll road called Southwest Parkway in Tarrant County and Chisolm Trail 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.
In March, 2009, work was completed on a short stretch of TX 121 northeast of DFW Airport which upgraded 2 signalized at-grade intersections to a freeway, with overpasses at both intersections, clearing up a problem for rush-hour traffic.
Sam Rayburn Tollway
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.  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.
To answer some of these complaints, Texas legislators pressed the Texas Department of Transportation to allow the NTTA to bid. 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.
On June 28, 2007, the Texas Transportation Commission announced it would pursue the proposal from the North Texas Tollway Authority (NTTA).
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.
Toll rates are effective July 1st, 2013. All exits are unnumbered.
||Fort Worth||0.00||0.00||Spur 347 west (Belknap Street) – Downtown Fort Worth||Western terminus|
|0.20||0.32||I-35W / US 287 / US 377 south – Denton, Waco|
|0.30||0.48||US 377 north (Belknap Street)||Northbound exit and southbound entrance|
|2.70||4.35||Maxine Street||Northbound exit and southbound entrance|
|Haltom City||3.10||4.99||Haltom Road|
|Richland Hills||6.40||10.30||Handley-Ederville Road|
|7.30||11.75||I-820 south / SH 183 west / SH 10 east||signed as exit 24B, west end of overlap with I-820 / SH 183|
|8.40||13.52||Pipeline Road / Glenview Drive||Signed as exit 23|
|North Richland Hills||8.50||13.68||SH 26 / FM 1938 north / Bedford-Euless Road – Colleyville, TCC NE Campus||Signed as exit 22A|
|8.90||14.32||I-820 west||Signed as exit 22B, east end of overlap with I-820|
|Hurst||10.10||16.25||FM 3029 north (Precinct Line Road) / Hurstview Drive|
|11.50||18.51||Norwood Drive / Brown Trail|
|Bedford||12.50||20.12||Bedford Road / Forest Ridge Drive / Brown Trail|
|13.00||20.92||Central Drive / Forest Ridge Drive|
|13.60||21.89||SH 183 east – Irving, D/FW Airport South Entry||East end of overlap with SH 183, northbound exit and southbound entrance|
|14.00||22.53||To SH 183 east (via Murphy Drive / Euless Westpark Way)||Southbound exit and northbound entrance, northbound access via SH 183|
|16.70||26.88||FM 157 south / Cheek-Sparger Road|
|18.70||30.09||Stone Myers Parkway||Northbound exit and southbound entrance|
|19.30||31.06||SH 360 south – Arlington||Southbound exit and northbound entrance, north end of SH 360|
|19.80||31.87||William D. Tate Avenue||Northbound exit and southbound entrance, southbound access via SH 114|
|20.80||33.47||SH 114 south / SH 26 – Bridgeport||South end of overlap with SH 26 / SH 114 overlap|
|21.10||33.96||Spur 103 (Main Street)|
SH 26 north / Bus. SH 114-L west (Texan Trail)
|North end of overlap with SH 26|
|22.40||36.05||SH 114 east – Irving, Dallas||North end of overlap with SH 114|
|22.90||36.85||International Parkway south – D/FW Airport|
|24.30||39.11||I-635 east||West end of I-635|
|24.70||39.75||Bass Pro Drive – Grapevine, Coppell|
|25.30||40.72||FM 2499 north (Grapevine Mills Parkway) – Flower Mound||No northbound entrance|
||26.20||42.16||SH 26 south / Sandy Lake Road / Grapevine Mills Parkway||No northbound access to SH 26|
Bus. SH 121-H north – Lewisville
|South end of SH 121 Bus.|
|28.80||46.35|| SH 121 north / Denton Tap Road
SH 121 / Sam Rayburn Tollway
|SH 121 moves to the frontage roads, south end of Toll 121
South end of the Sam Rayburn Tollway
|29.40||47.31||Denton Tap Main Lane Gantry ($0.53 TollTag, $0.80 ZipCash)|
|30.00||48.28||MacArthur Boulevard||$0.25 TollTag, $0.48 ZipCash (southbound exit/northbound entrance)|
|Lewisville||31.10||50.05||I-35E / US 77 / SH 121 south – Dallas, Denton||Northbound exit to I-35E north is via MacArthur Boulevard exit, SH 121 enters/exits main lanes|
|Carrollton||32.30||51.98||Marchant Boulevard / Huffines Boulevard|
|33.20||53.43||SH 121 north / Hebron Parkway||SH 121 enters/exits main lanes|
|34.30||55.20||Carrollton Parkway||$0.25 TollTag, $0.48 ZipCash (northbound exit/southbound entrance)|
|Lewisville||35.10||56.49||FM 544 (Parker Road)||$0.35 TollTag, $0.58 ZipCash (northbound exit/southbound entrance)|
Bus. SH 121-H south (Old Denton Road) / FM 2281 – Lewisville
|$0.40 TollTag, $0.63 ZipCash (northbound exit/southbound entrance), north end of SH 121 Bus.|
|The Colony||36.60||58.90||Standridge Drive||$0.61 TollTag, $0.91 ZipCash (northbound exit/southbound entrance)
$0.78 TollTag, $1.17 ZipCash (southbound exit/northbound entrance)
|36.90||59.38||FM 423 (Main Street) / Josey Lane – Little Elm, Carrollton||$0.74 TollTag, $1.11 ZipCash (northbound exit/southbound entrance)
$0.78 TollTag, $1.17 ZipCash (southbound exit/northbound entrance)
|37.50||60.35||Josey Main Lane Gantry ($1.38 TollTag, $2.07 ZipCash)|
|38.30||61.64||Plano Parkway / Paige Road||$0.51 TollTag, $0.77 ZipCash (southbound exit/northbound entrance)|
|Plano||39.90||64.21||Spring Creek Parkway||$0.26 TollTag, $0.49 ZipCash (southbound exit/northbound entrance)|
||Frisco–Plano line||41.70||67.11||Dallas North Tollway / Dallas Parkway|
|42.80||68.88||SH 289 (Preston Road)||$0.25 TollTag, $0.48 ZipCash (northbound exit/southbound entrance)|
|43.90||70.65||Hillcrest Road / Rasor Boulevard||$0.25 TollTag, $0.48 ZipCash (northbound exit/southbound entrance)|
|45.20||72.74||Coit Road||$0.56 TollTag, $0.84 ZipCash (northbound exit/southbound entrance)|
|46.30||74.51||Independence Parkway||$0.74 TollTag, $1.11 ZipCash (northbound exit/southbound entrance)|
|47.20||75.96||FM 2478 (Custer Road)||$0.92 TollTag, $1.38 ZipCash (northbound exit/southbound entrance)|
|47.50||76.44||Custer Main Lane Gantry ($1.91 TollTag, $2.87 ZipCash)|
|McKinney–Allen line||48.10||77.41||Exchange Parkway / Craig Ranch Parkway||$0.99 TollTag, $1.49 ZipCash (southbound exit/northbound entrance)|
|49.00||78.86||Alma Drive||$0.73 TollTag, $1.10 ZipCash (southbound exit/northbound entrance)|
|50.00||80.47||CR 150 (Stacy Road)||$0.57 TollTag, $0.86 ZipCash (southbound exit/northbound entrance)|
|50.80||81.75||Lake Forest Drive / Watters Road||$0.44 TollTag, $0.67 ZipCash (southbound exit/northbound entrance)|
|51.80||83.36|| SH 121 south / Hardin Boulevard / Chelsea Boulevard
SH 121 / Sam Rayburn Tollway
|$0.28 TollTag, $0.51 ZipCash (southbound exit/northbound entrance)
SH 121 enters/exits main lanes, North end of Toll 121 / Sam Rayburn Tollway
|52.90||85.13||US 75 east / Spur 399 – Dallas||South end of overlap wtih US 75, signed as exit 38|
|McKinney||54.00||86.90||Eldorado Parkway||Signed as exit 39|
|55.80||89.80||Spur 359 (Louisiana Street) / FM 3038 (Virginia Parkway)||Signed as exit 40A|
|56.60||91.09||White Avenue||Signed as exit 40B|
|57.10||91.89||US 380 (University Drive)||Signed as exit 41|
|58.00||93.34||Wilmeth Road||Signed as exit 42|
|59.70||96.08||Weston Road||Signed as exit 43|
|60.70||97.69||Telephone Road / Davis Road||Signed as exit 44|
|61.20||98.49||US 75 north – Sherman||North end of overlap with US 75, signed as exit 45|
|Melissa||62.20||100.10||SH 5 north – Melissa||Interchange, no eastbound entrance|
|63.70||102.52||FM 545 (Sherman Street)|
|69.30||111.53||FM 455 (White Street) – Celina|
|Westminster||71.60||115.23||FM 2862 (Houston Street)|
||75.40||121.34||SH 160 – Whitewright, Farmersville|
|80.70||129.87||US 69 – Bells, Greenville||Interchange|
Bus. SH 121 north
|South end of SH 121 Bus.|
|86.50||139.21||SH 11 – Tom Bean, Commerce||Interchange|
Bus. SH 121 south
|North end of SH 121 Bus.|
|93.70||150.80||SH 56 west – Sherman||South end of overlap with SH 56|
|94.20||151.60||SH 56 east – Honey Grove||North end of overlap with SH 56|
|96.10||154.66||US 82 – Sherman, Paris||Interchange, exit 670 on US 82|
|98.30||158.20||SH 78 – Farmersville, Durant, OK||Northern terminus|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
- Transportation Planning and Programming Division. "Highway Designation File: State Highway No. 121". Texas Department of Transportation. Retrieved 2010-06-15.
- 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.
- 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.
- "Toll Rate Charts". North Texas Tollway Authority. July 1, 2013. Retrieved September 28, 2013.
- Google Inc. Google Maps – SH 121 (Map). Cartography by Google, Inc. https://www.google.com/maps/preview#!data=!1m4!1m3!1d724405!2d-96.6328035!3d33.2070039!4m28!3m27!1m5!1s1632-1686+Texas+347+Spur%2C+Fort+Worth%2C+TX+76102!2s0x864e713a97fbf8cf%3A0x2071e6bf3282371e!3m2!3d32.7629423!4d-97.3208705!1m4!3m2!3d33.6305042!4d-96.1779188!6e2!2e0!3m8!1m3!1d2844!2d-97.3174736!3d32.7655666!3m2!1i1313!2i651!4f13.1!9m5!2m2!3d32.7833682!4d-97.2698674!3s0x864e7753b643907f%3A0x5ff2d6cd329c7ecd!4f0.8586101&fid=0. Retrieved September 30, 2013.
|Wikimedia Commons has media related to Texas State Highway 121.|
- www.Texas121.org - Official Site[dead link]
- Denton & Collin County section of SH 121 - from dfwfreeways.info