User:Viridiscalculus/List of Tennessee state highways (300–399)

The following is a list of state highways in Tennessee with numbers between 300 and 399. Several of these highways have their own articles; those highways are summarized here and a link is provided to the main article. The Tennessee Department of Transportation (TDOT) splits highways into two classifications, primary highways and secondary highways. Unless most states, in which the designation of primary and secondary highways is made internally and highways of different classifications use the same type of highway marker, the two classifications of highways in Tennessee use different types of highway markers. Different segments of the same numbered highway may be in either system. Highways in both systems include both highway markers in their section of this list.

State Route 300
State Route 300 (SR 300) is a 1.46 mi four-lane controlled-access expressway inside of Memphis, Tennessee, that runs from I-40 to US 51. SR 300 is unsigned throughout its length except on mileposts. The exit signs on I-40 just refer to SR 300 as Exit 2A going to US 51 and Millington. SR 300 carries a 55 mph speed limit. Local media sometimes refers to this short route as the "101 Connector", its former federal aid urban designation (U-101 connector). The entire length of SR 300 is part of the National Highway System. SR 300 was originally part of an abortive effort in the 1960s to build an expressway connecting the northern portion of the then I-240 to Mud Island. Ghost ramps and abandoned grading for this expressway still exist at the current western terminus of SR 300 at US 51 and also at I-40 Exit 1 in downtown Memphis. SR 300 is slated to be signed as part of the proposed I-69. In November 2004, the Tennessee Department of Transportation announced alternative A-1 (SIU 9) as the preferred alignment of future I-69 through the Memphis area, which will include SR 300.

State Route 301
State Route 301 (SR 301) is a 0.9 mi state highway located entirely in Bledsoe County, Tennessee. The route originates at a junction with SR 285 in Mount Crest within Bledsoe State Forest, and its northern terminus is at a dead end at the Taft Youth Center, a facility of the Tennessee Department of Children's Services. The entire route of SR 301 is a rural two-lane highway.

State Route 302
State Route 302 (SR 302) is a 13.3 mi north–south state highway in Rhea County. SR 302 begins in Old Washington at an intersection with SR 30. It winds its way north through farmland as Old Dixie Highway and Old Stage Road. It then has a short concurrency with SR 68 before following along the banks of Watts Bar Lake (as New Lake Road) to enter Spring City, where SR 302 comes to an end at an intersection with US 27/SR 29. The entire route of SR 302 is a two-lane highway.

State Route 303
State Route 303 (SR 303) is a short 5.7 mi state highway in Rhea County, Tennessee. For the majority of its length, it is known as Cranmore Cove Road. SR 303 begins in Graysville at an intersection with US 27/SR 29. It goes north through downtown as Dayton Avenue before turning onto Cranmore Cove Road. The highway then goes northeast through a narrow valley between two ridges before coming to an end at an intersection with SR 30 just west of Dayton. The entire route of SR 303 is a two-lane highway.

State Route 304
State Route 304 (SR 304) is a state highway in Meigs and Roane counties in the eastern portion of the U.S. state of Tennessee. It connects Decatur to Kingston via SR 68 and Ten Mile. It provides access to many marinas and lakeside homes along Watts Bar Lake. SR 304 begins in Meigs County in Decatur at SR 58 and heads north and after 2.4 miles it begins to follow closely to the Tennessee River and Chickamauga Lake (and past Watts Bar Dam, Watts Bar Lake). It passes close to Watts Bar Dam and across the river is Watts Bar Nuclear Generating Station. In the same area as the dam, SR 304 junctions with SR 68 and begins a 0.6-mile-long wrong-way concurrency. Then it turns east on SR 68 toward Sweetwater to a junction where SR 304 turns northward and SR 68 continues southeast. SR 304 again begins to follow closely to the Tennessee River and enters the community of Ten Mile and passes some businesses, marinas and the community's post office. It then leaves the river for a short distance and enters Roane County and continues to follow the river, until it comes to an end at SR 58 south of Kingston and north of Ten Mile.

State Route 305
State Route 305 (SR 305) is a north-south state highway, although it goes in a more northwest-southeast direction, in Meigs and McMinn counties of East Tennessee. SR 305 begins in McMinn County in downtown Athens at an intersection with SR 30 and SR 39. It goes north through neighborhoods along Ingleside Avenue to have an intersection with US 11/SR 2. The highway then turns northwest to leave Athens and have an interchange with I-75 at exit 52. It continues northwest through farmland and rural areas to cross into Meigs County. It continues northwest through farmland before coming to an end at an intersection with SR 68. The entire route of SR 305 is a two-lane highway.

State Route 306
State Route 306 (SR 306) is a secondary state route in Bradley and Meigs counties in Tennessee. SR 306 begins at an intersection with SR 60 in the unincorporated community of Hopewell a few miles northwest of Cleveland in Bradley County. The route continues north as Eureka Road through mostly farmland for several miles. Several miles later the route passes through the Chickamauga Lake Wildlife Management Area before coming to an intersection with the western terminus of SR 308 (Lower River Road). To continue on SR 306, northbound motorists must stop and make a left turn at this intersection; the southbound lane of SR 306 contains a stop sign at this intersection. Continuing as Lower River Road and running south of the Chickamauga Lake embayment of the Hiwassee River, SR 308 travels more westerly, and a few miles later crosses into Meigs County, becoming Brittsville Road. A few miles later, SR 306 reaches its northern terminus with SR 58 in the unincorporated community of Brittsville.

State Route 307
State Route 307 (SR 307) is a north–south state highway in McMinn and Monroe counties of East Tennessee. SR 307 begins in McMinn County in downtown Athens at an intersection with SR 30 and SR 39. It goes northeast along East Madison Avenue before following Eastanallee Avenue to pass through neighborhoods. SR 307 then merges back onto East Madison Avenue to cross a bridge over a creek and pass the headquarters of Mayfield Dairy. The highway continues northeast through neighborhoods before leaving Athens and passes through farmland as Old Athens Madisonville Road. It then crosses into Monroe County as Eastanaula Road and continues northeast through farmland and rural areas before coming to an end at an intersection with SR 68 between Sweetwater and Madisonville, approximately half a mile west of The Lost Sea.

State Route 308
State Route 308 (SR 308) is a secondary state route located in northern Bradley County, Tennessee that serves the city of Charleston. The route is 7.5 mi long and is located entirely in Bradley County. SR 308 begins at a bearing intersection with SR 306 (Eureka Road, Lower River Road) in northwestern Bradley County. SR 306 continues south to the community of Hopewell northwest of Cleveland, and turns northwest to Meigs County and SR 58. The route continues north as Lower River Road, taking its name from its parallel of the Hiwassee River, and crosses the Chickamauga Lake impoundment where Candies Creek runs into the river. Approximately one mile later, the road turns sharp east, crossing Candies Creek Ridge a short distance later before coming to an intersection with Old Lower River Road, the former route of SR 308, almost two miles later. The route then turns sharp south and runs straight for another mile, before turning east once again, and coming to an interchange with I-75. The route then becomes known as Lauderdale Memorial Highway. The route continues for another mile, passing through the southern edge of an industrial area, and crosses South Mouse Creek, before entering farmland and passing Walker Valley High School. A short distance later, the road comes to a four-way intersection with Walker Valley Road, and begins its descent over a ridge. Approximately one mile later, it meets its eastern terminus in southern Charleston with US 11 (North Lee Highway/Hiwassee Street/SR 2).

SR 308 originally continued to Charleston along the Hiwassee on what is now Old Lower River Road. This route is very curvy, and contains a one-lane bridge across Mouse Creek. For this reason, part of the highway was moved to its current location in the late 1960s and early 1970s when the interstate was built. The new section between I-75 and US 11 was named Lauderdale Memorial Highway in memory of a superintendent of the Bradley County Road Department who died months before its completion and had lobbied for its construction. The northern edge of the industrial area traversed by SR 308 is located on this route, which includes such industries as Wacker Polysilicon and Olin Corporation.

State Route 309
State Route 309 (SR 309), also known as Union Grove Road, is a 2.6 mi east–west state highway in McMinn County, Tennessee. It serves as the primary access road from Interstate 75 (I-75, Exit 56) to the town of Niota. SR 309 begins at an interchange with I-75 (Exit 56). It heads east past a few roadside businesses before passing through farmland as a two-lane highway. It then enters Niota and comes to an end at an intersection with U.S. Route 11 (US 11, Willson Street/SR 2) on the north side of town.

State Route 310
State Route 310 (SR 310), also known as Mecca Pike, is a short east–west state highway in McMinn County, Tennessee. It connects Etowah, via SR 39, to Tellico Plains. SR 310 begins in Etowah at an intersection with US 411/SR 30 (Tennessee Avenue/SR 33). It goes east to cross a bridge over some railroad tracks before leaving Etowah and going down a narrow valley between mountains. SR 310 passes through the community of Conasauga before passing along the edge of the Cherokee National Forest, to the south, before entering the community of Mecca. It crosses a bridge over a creek before coming to an end at an intersection with SR 39. SR 310 is a two-lane rural highway for its entire length.

State Route 311
State Route 311 (SR 311) is an unsigned state highway with primary and secondary sections in Cleveland in Bradley County. The highway's primary segment is the southern section of APD-40, the four-lane divided eastern bypass of Cleveland. The southern portion of the bypass is signed as US 74 and US 64 Bypass. The portion of SR 311 along the bypass extends from I-75 through interchanges with the concurrent US 11 and US 64 to McGrady Drive, whose intersection with the bypass is one end of the bypass's one-quadrant interchange with Dalton Pike. From McGrady Pike, SR 60 forms the state highway designation along the remainder of the bypass on the east and north sides of Cleveland. SR 60 and SR 311 run concurrently along McGrady Drive. At Dalton Pike, SR 60 heads south while SR 311 heads north on its state secondary highway section. SR 311 passes under the bypass and reaches its terminus at an intersection with SR 74, which heads north on Woodland Avenue toward downtown Cleveland and east on Spring Place Road.

State Route 312
State Route 312 (SR 312) is a secondary state route in Hamilton and Bradley counties in the US state of Tennessee that runs from Birchwood to Cleveland. The route runs east and west, however, much of the route in Hamilton County runs north and south. SR 312 begins at an intersection with SR 60 in Birchwood, a small community in northeastern Hamilton County, and travels southwest for approximately 13 mi as Birchwood Pike through rural farmland, before turning east and intersecting with SR 58 near Harrison. The route then runs north concurrently with SR 58 for about 1/2 mi, before turning east as Mahan Gap Road. The route runs through the community of Snow Hill, and about 2 mi later comes to a four-way intersection with Ooltewah-Georgetown Road, a major connector road between the communities of Ooltewah and Georgetown. The route then crosses Mahan Gap in White Oak Mountain, and about 1+1/2 mi later crosses into Bradley County, where it becomes known as Harrison Pike. About 2+1/4 mi later it intersects with Bancroft Road, a connector to McDonald. The route continues for another 2+1/2 mi through a rural residential area, before turning sharp east, and entering the community of Prospect. About 1+1/2 mi later the route crosses I-75, but does not interchange. The route then continues for another 2 mi, crossing Candies Creek, Candies Creek Ridge in a gap, and entering Cleveland, before coming to an intersection with US 11 Bypass (Keith Street). The route continues east as Inman Street for another 1/5 mi before meeting its eastern terminus with US 11/US 64 (Ocoee Street, Broad Street) in downtown Cleveland. Also at this intersection US 64 splits off from US 11, and continues east as Inman Street.

State Route 313
State Route 313 (SR 313) is a secondary state highway mostly in Bradley County but also in Polk County. Although it is signed as an east-west highway, it actually runs diagonally on a northwest-southeast axis. SR 313 is known as Ladd Springs Road its entire length. It begins at an intersection with US 411 (SR 33) in southeastern Polk County in the unincorporated community of Old Fort. About a mile later it crosses into Bradley County. SR 313 continues for several miles through a rural and mostly agricultural area before reaching its terminus with SR 74 in the census designated place of Wildwood Lake. This is about four miles southeast of Cleveland.

State Route 314
State Route 314 (SR 314), also known as Parksville Road, is a 6.1 mi state highway in Polk County, Tennessee, connecting the town of Benton with the community of Parksville and the Cherokee National Forest. SR 314 begins in Parksville at an intersection with US 64/US 74 (Ocoee Scenic Byway/SR 40) just north of Ocoee Dam No. 1 (Parksville Dam). It goes north through farmland along the western edge of the Cherokee National Forest before curving to the west and entering Benton. SR 314 then comes to an end at an intersection with US 411 (SR 33). The entire route of SR 314 is a two-lane Highway.

State Route 315
State Route 315 (SR 315), also known as Tellico-Reliance Road, is a 15.0 mi north–south state highway in the Unicoi Mountains region of southeastern East Tennessee. SR 315 begins in Polk County in Reliance at an intersection with SR 30. It immediately heads across the Hiwassee River via a long bridge to pass through the community before leaving Reliance and entering the Unicoi Mountains and the Cherokee National Forest. The highway then winds its way northeast through the mountains to cross into Monroe County. SR 315 then leaves the mountains and the forest to pass through farmland before coming to an end at an intersection with SR 39 in Jalapa. The entire route of SR 315 is a rural two-lane highway.

State Route 316
State Route 316 (SR 316) is a 0.4 mi state highway located entirely in Hamilton County, and the city of Chattanooga, Tennessee. It follows M.L.K. Boulevard between US 27 (I-124/SR 27/SR 29) to SR 2 in downtown Chattanooga.

State Route 317
State Route 317 (SR 317) a state highway extending from Chattanooga, Tennessee, through Ooltewah, Collegedale, Apison, and ending in Bradley County. State Route 317 is also known as Bonny Oaks Drive, Volkswagen Drive, Apison Pike, Wesleyan Road, and Weatherley Switch Road SE; It was formerly known as Old Lee Highway. It dead ends into State Route 60 in Bradley County. In Chattanooga, this road crosses State Route 58.

State Route 318
State Route 318 (SR 318) is a short state highway in Hamilton County in the southeastern portion of the U.S. state of Tennessee. It serves as a connector between US 11 / US 41 / US 64 / US 72 and SR 148 and the Lookout Mountain tourist area. SR 318 begins in the Tiftonia/Lookout Valley area of West Chattanooga at US 11/US 41/US 64/US 72. It is a narrow, winding mountain road that rises above the U.S. Highways which lie at the base of the mountain. It ends at SR 148 north of the town of Lookout Mountain and the route travels near the eponymous mountain ridge of the same name.

State Route 319
State Route 319 (SR 319) is a state highway in southeast Tennessee, starting at the intersection of SR 153 in Chattanooga, traveling to the area of Soddy-Daisy where it intersects with US 27, and the route comes to an end. SR 319 begins on the northeast side of Chattanooga at SR 153 and SR 58. SR 319 has a short 1.8 mile concurrency/overlap with SR 58, to where SR 58 heads southwest and SR 319 turns north to have an interchange with Access Road and Hixson Pike after this intersection it enters Chattanooga's Hixson neighborhood. SR 319 then turns east and Junctions with SR 153 and turns north back along SR 153 and begins a very short 0.7 mile-long concurrency to an interchange where SR 153 heads northwest and SR 319 turns northeast and leaves Chattanooga/Hixson 3.7 miles from SR 153. It then enters the community of Middle Valley and then after 3.3 miles it leaves Middle Valley corporate limits and enters the city of Lakesite and in this area it turns back and forth from east to north. After it leaves Lakesite it passes the Sequoyah Nuclear Plant and turns northwest and enters Soddy-Daisy city limits to end at US 27/SR 29.

State Route 320
State Route 320 (SR 320) is a west-east state highway located entirely in Hamilton County in southeastern Tennessee. it traverses mainly the eastern portions of the county, including Chattanooga’s eastern outskirts and the census designated place of East Brainerd. SR 320, which is known as East Brainerd Road its entire length, and begins at an intersection with Lee Highway (US 11/64/SR 2) near the Chattanooga Metropolitan Airport. From here SR 320 travels eastward as a two lane road to traverse I-75/US 74’s Exit 3 interchange, where it widens to five lanes, including a center turn lane. SR 320 continues eastward through the community of East Brainerd, before ending at a four way intersection with SR 321 just south of Collegedale. TDOT has been working since 2015 to widen the route to four lanes to this point, and some of this project is already complete. Although the state route designation ends at this point, a county maintained road also labeled as East Brainerd Road continues east to SR 317 in Apison, and some maps show this portion as part of SR 320.

State Route 321
State Route 321 (SR 321) is a north-south state highway located entirely in Hamilton County in southeastern Tennessee. It traverses mainly the eastern outskirts of Chattanooga, and its eastern suburbs. From the Georgia state line and the northern terminus of Georgia State Route 151, SR 321 begins a northerly course to intersect State Routes 320 and 317, the latter of which is located in Collegedale. Its northern terminus is at a junction with US 11/64 and SR 2 in Ooltewah. It is known as Ooltewah Ringgold Road for the majority of its length.

State Route 322
State Route 322 (SR 322) is an east–west state highway in East Tennessee, connecting Paint Rock with Vonore via Sweetwater. It serves as an alternate route for SR 72, bypassing Loudon. SR 322 begins in Roane County in Paint Rock at an intersection with SR 72. It goes southeast as Sweetwater Road and traverses some ridges and valleys before curving east to enter farmland and shortly passing through the southernmost part of Loudon County. SR 322 then crosses in Monroe County as Oakland Road to enter Sweetwater at an interchange with I-75 (Exit 62). It continues east to bypass downtown to the north and have an intersection with US 11/SR 2. The highway then leaves Sweetwater and continues east through farmland as Sweetwater Vonore Road. SR 322 then makes a sharp right at an intersection with Loudon Road before crossing over a ridge and coming to an end at another intersection with SR 72 at the northwest corner of Vonore.

State Route 323
State Route 323 (SR 323), also known as Pond Creek Road, is a short 2.2 mi east–west state highway in Loudon County, Tennessee. It serves as the primary access road from Interstate 75 (I-75) at exit 68 to the town of Philadelphia, at U.S. Route 11 (US 11). SR 323 begins at an interchange with I-75 at exit 68. It goes east as a two-lane highway through farmland with a speed limit of 50 mph. The highway then enters Philadelphia and crosses over a set of railroad tracks before coming to an end at an intersection with US 11 (Lee Highway and its unsigned designation of SR 2).

State Route 324
State Route 324 (SR 324), also known as Sugar Limb Road, is a short state highway in Loudon County, Tennessee. It serves as one of two roads connecting the city of Loudon with Interstate 75 (I-75); the other is SR 72. SR 324 begins at an interchange with I-75 at exit 76. It travels southeasterly through rural hilly terrain along the banks of the Tennessee River. The highway then enters the Loudon city limits and passes through industrial areas before coming to an end at an intersection with U.S. Route 11 (US 11, Lee Highway/SR 2) north of downtown. The entire route of SR 324 is a two-lane highway.

State Route 325
State Route 325 (SR 325) is an 18.3 mi secondary state highway located in Pickett and northwestern Fentress counties northeastern Middle Tennessee. The western terminus of SR 325 is located on the eastern shores of Dale Hollow Lake, at the Star Point Resort in western Pickett County. SR 325 then passes through Cordell Hull Birthplace State Park before running concurrently with SR 111 into downtown Byrdstown. SR 325 winds its way eastward, some of its path straddles the Pickett/Fentress County line along its way to its eastern end at a junction with US 127 (SR 28) just northwest of Pall Mall.

SR 325 west of Byrdstown was originally a part of SR 53 that served as a direct route from Byrdstown to Celina, in Clay County until sometime around 1942-43, when the U.S. Army Corps of Engineers impounded the Obey River to create Dale Hollow Lake. The dam was built just off the current SR 53. The lake’s formation disconnected the roadway between the two cities, and parts of SR 53 in that area is now under water. After the dam was built in Clay County, SR 53 was rerouted to the Kentucky state line to become a then-new alignment of KY 61, which also followed a path directly into the lake. As a result, the quickest way to get from Celina to Byrdstown is to drive a route from the two cities via Livingston, in Overton County using State Routes 52 and 111. Parts of SR 325 in downtown Byrdstown was also an original alignment of SR 42 (now SR 111) until that route was realigned to its current path into and around the city.

State Route 326
State Route 326 (SR 326), also known as Gallaher Road, is a short 1.3 mi state highway in Roane County, Tennessee. It connects U.S. Route 70 (US 70) with Interstate 40 (I-40). SR 326 begins at an intersection with US 70/SR 1 east of downtown Kingston. It goes north through rural areas as a two-lane highway with a speed limit of 55 mph. The highway then comes to an interchange with I-40 and SR 58 at the Kingston city limits (exit 356), where SR 326 ends and Gallaher Road continues north towards Oak Ridge as SR 58.

State Route 327
State Route 327 (SR 327), also known as Blair Road, is a 5.7 mi north–south state highway in Roane County, Tennessee. It serves as a connector between the towns of Oliver Springs and Harriman and the western end of the city of Oak Ridge. SR 327 begins in Oak Ridge at an intersection with SR 58. It goes north to pass by the historic George Jones Memorial Baptist Church and K-25 before crossing over Southern Appalachia Railway Museum's excursion railroad, to which it runs parallel to (and crosses several times) for the rest of its length, before crossing over Poplar Creek on the Malcom P. Crews Memorial Bridge. The highway then passes by a substation before leaving Oak Ridge and paralleling Poplar Creek. SR 327 then crosses a couple of ridges and valleys, where it leaves Poplar Creek and has intersections with Poplar Creek Road, Old Harriman Highway, and Dyllis Road. The highway then passes through some mountainous terrain before crossing a Norfolk Southern railroad and coming to an end at an intersection with SR 61 in the community of Blair. The entire route of SR 327 is a two-lane highway.

State Route 328
State Route 328 (SR 328) is a north–south state highway in Roane and Morgan counties of East Tennessee. It connects the town of Oakdale to the cities of Harriman and Wartburg. SR 328 begins in Roane County in downtown Harriman at an intersection with US 27/SR 61 (Roane Street/SR 29). It goes northwest along Georgia Street and immediately crosses a bridge over some railroad tracks before merging onto Oakdale Road. It passes through neighborhoods before running along the banks of the Emory River and passing through the Emory Gap through Walden Ridge. The highway then enters the Cumberland Plateau and leaves Harriman to cross into Morgan County. SR 328 winds its way north as Old Harriman Highway, running parallel to the Emory River, through rural areas to enter Oakdale and have an intersection with SR 299 just west of downtown. It then leaves Oakdale and the Emory River and winds its way north through mountains and rural areas of the Cumberland Plateau before coming to an end at an intersection with US 27/SR 29. SR 328 was once designated as State Route 29A (SR 29A).

State Route 329
State Route 329 (SR 329), also known as Deer Lodge Highway, is a 9.2 mi north–south state highway in Morgan County, Tennessee. It is the primary road in and out of the community of Deer Lodge. SR 329 begins at a Y-intersection with SR 62. It winds it way north to enter the community of Deer Lodge and makes sharp turn to the east at an intersection with Irving Street and Old Deer Lodge Pike in the center of town. The highway then winds its way east then northeast through a mix of farmland and wooded areas before entering Sunbright and coming to an end at an intersection with US 27/SR 29. The entire route of SR 329 is a two-lane highway and lies on top of the Cumberland Plateau.

State Route 330
State Route 330 (SR 330) is a state highway in East Tennessee, most of which is also known as Frost Bottom Road, runs southwest to northeast from Oliver Springs to the junction with SR 116 at Laurel Grove. SR 330 was designated a state highway about 1982. SR 330 begins in Roane County in Oliver Springs at an intersection with SR 61 and SR 62. It goes south as Winter Gap Road before turning east (left) on Main Street. It then enters downtown curves to the south to cross over a railroad track to enter Anderson County. It then comes to a 4-way stop, where SR 330 turns east (left) onto E Spring Street, where it leaves downtown and begins passing through neighborhoods. It then has another railroad crossing before leaving Oliver Springs and becoming slightly curvy for a short distance before crossing a bridge and coming to an intersection with Dutch Valley Road, where SR 330 turns northeast (left) onto Frost Bottom Road. It continues northeast through a narrow valley through rural areas as an improved 2-lane highway before entering Laurel Grove and coming to an end at an intersection with SR 116. The entire route of SR 330 is a 2-lane roadway.

State Route 356
State Route 356 (SR 356), also known as E Wood Street, is a 0.95 mi state highway in Henry County that serves as a connector between US 641/SR 69 in downtown Paris to US 79 (SR 76) on the town's east side. Excluding its eastern end, the entire route of SR 356 is a two-lane highway. It also follows of a former alignment of US 79 (SR 76).

State Route 389
State Route 389 (SR 389) is a 0.3 mi state highway in the Chattanooga area in Hamilton County. The route follows 4th Street between I-124/US 27 and SR 8 in downtown Chattanooga.

State Route 396
State Route 396 (SR 396) is a 4.75 mi primary state route located in Maury County and Williamson County in Middle Tennessee. The highway runs from the General Motors Spring Hill Manufacturing plant east to I-65 within Spring Hill. SR 396 is commonly referred to as Saturn Parkway, which takes its name from Saturn Corporation, a subsidiary of General Motors that operated the plant from 1990 to 2004 as its sole manufacturing facility. All of SR 396 is part of the National Highway System.