Tennessee State Route 20

State Route 20
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Route information
	Maintained by TDOT
Length:	143.04 mi (230.20 km)
Existed:	1917 – present
Major junctions
West end:	US 51 / US 412 / SR 3 / SR 211 in Dyersburg
	US 70A / US 79 near Bells; I-40 in Jackson; ; US 45 Byp. in Jackson; US 45 in Jackson; US 70 in Jackson; US 412 in Hohenwald; Natchez Trace Parkway
East end:	US 43 in Summertown
Location
Counties:	Dyer, Crockett, Madison, Henderson, Decatur, Perry, Lewis, Lawrence, Maury
Highway system

State Route 20 (abbreviated SR 20) is a 143.04-mile (230.20 km) long west–east primary state route beginning in Dyersburg and ending near Summertown. SR 20 is unsigned and overlapped with US 412, except a short section between Hohenwald and Summertown.

Route description

SR 20 begins in Dyersburg at an expansive parclo interchange at the route's junction with US 51, SR 211, and hidden SR 3. SR 20 begins as a four-lane expressway with partial access control and continues east traversing mostly farmland through rural Dyer, Crockett, and Madison counties. At Jackson, Tennessee, SR 20 remains hidden and follows US 412 Business through the city while US 412 is overlapped with Interstate 40 between Exit 79 and Exit 87. SR 20 follows Hollywood Drive and North Parkway through the city of Jackson and is briefly overlapped with US 70 in east Jackson. The route is a two-lane highway on Hollywood Drive and US 70 and is a mix of four-lane divided or five-lane undivided on North Parkway inside Jackson. Beyond Jackson, SR 20 resumes its hidden overlap with US 412 and continues east toward Lexington as a two-lane highway. Construction is in progress to expand this route to a four-lane highway on a section between the Madison County Line and Crucifer. SR 20 between Chesterfield and Summertown is largely a narrow two-lane rural route carrying a 55 mph (89 km/h) speed limit. State Route 20 is designated as part of the Delta Development Highway System^[3] throughout West Tennessee and carries a Tennessee Scenic Parkway designation from Lexington to Linden and again from Hohenwald to Summertown.^[4]

History

Prior to 1981^[5] and dating back as far as 1958,^[6] SR 20 at its western end extended beyond Dyersburg following what is now SR 210, US 51, SR 211 and SR 104 to Heloise, Tennessee on the Mississippi River in extreme western Dyer County.^[5]

Future

Tennessee Department of Transportation currently has plans to expand existing SR 20 from two-lane to four-lane or completely reconstruct the route on a new alignment from Interstate 40 in Madison County to the Tennessee River near Perryville.^[3] Construction is scheduled to begin in 2008 to widen a portion of SR 20 to four-lanes from the Madison County line to Crucifer Road.^[7]

Major intersections

County	Location	mi^[8]	km	Destinations	Notes
Dyer	Dyersburg	0.00	0.00	US 412 west / US 51 / SR 211 (unsigned) / SR 3	Western terminus of SR 20. Hidden SR 20 begins overlapped with US 412
	Dyersburg	3.01	4.84	SR 104 – Dyersburg, Trenton
	Bonicord	7.40	11.91	SR 210 south – Fowlkes, Dyersburg
Crockett	Friendship	15.55	25.03	SR 189 south – Friendship, Maury City
	Cairo	19.50	31.38	SR 152 east – Humboldt
	Cairo	21.11	33.97	SR 188 – Brownsville
	Alamo	23.39	37.64	SR 88 – Maury City, Alamo
	Bells	27.54	44.32	SR 88 – Alamo, Bells
		29.83	48.01	US 70A / US 79 / SR 76 (unsigned) – Brownsville, Humboldt
		30.82	49.60	SR 88 west – Bells
Madison	Jackson	41.85	67.35	I-40 / US 412 east – Memphis, Nashville	Hidden SR 20 continues east through Jackson overlapped with US 412 Business.
		43.65	70.25	US 45 (Keith Short Bypass) / SR 186 (unsigned)
		44.98	72.39	US 45 (Highland Avenue) / SR 5 (unsigned)
		48.08	77.38	US 70 west / SR 1 (unsigned)	SR 20/US 412 BUS begins brief overlap with US 70/SR 1
		50.86	81.85	US 70 east / SR 1 (unsigned) to I-40 / US 412 east	Overlap with US 70/SR 1 ends. US 412 Business Ends. Hidden SR 20 resumes overlap with US 412
	Springbrook	57.50	92.54	SR 152 to I-40
Henderson	Lexington	70.15	112.90	SR 104 west (W. Church Street)	Overlap with SR 104 begins.
		71.84	115.62	SR 22 – Adamsville, Huntingdon
		72.03	115.92	SR 104 east / SR 114 north	To Natchez Trace State Park. Overlap with SR 104 ends and overlap with SR 114 begins.
	Chesterfield	79.40	127.78	SR 114 south	Overlap with SR 114 ends.
Decatur	Beacon	84.38	135.80	SR 202 south (Beacon Road)
	Parsons	87.55	140.90	SR 69 – Decaturville, Camden
	Perryville	91.88	147.87	SR 100 west – Decaturville	Overlap with SR 100 begins.
Perry	Cypress Creek	93.94	151.18	SR 438 - Mousetail Landing State Park	Overlap with SR 100 continues.
	Linden	105.44	169.69	SR 13 – Waynesboro, Lobelville	Overlap with SR 100 continues.
	Chestnut Grove	108.23	174.18	SR 100 east	Overlap with SR 100 ends.
Lewis	Hohenwald	123.88	199.37	US 412 east / SR 99 east (unsigned) / SR 48 north	SR 20/US 412 overlap ends. Brief overlap with SR 48 & SR 99 begins.
		124.30	200.04	SR 48 south	Overlap with SR 48 ends. SR 20/SR 99 overlap continues.
		124.58	200.49	SR 99 west	Overlap with SR 99 ends. SR 20 becomes a fully signed route.
	Gordonsburg	130.74	210.41	Natchez Trace Parkway
Lawrence	Summertown	141.02	226.95	SR 240 south	Overlap with SR 240 Begins.
Lawrence		142.08	228.66	SR 240 north	Overlap with SR 240 ends.
Maury		143.04	230.20	US 43 / SR 6 (unsigned) – Lawrenceburg, Columbia	Eastern terminus of SR 20.
1.000 mi = 1.609 km; 1.000 km = 0.621 mi