Interstate 24 and Branches 
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  I-124

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From:  KY Line at Clarksville (Montgomery County)**
To:  in Chattanooga (Hamilton County)**
Total Length:  185 miles**
Nationally I-24 runs from I-57 near Marion, IL to I-75 in Chattanooga, TN, about 318 miles

** - A small segment west of Chattanooga, about 4 miles, dips into Georgia.  This Georgia mileage is included in the total.

ROUTE LOG
KY STATE LINE: 0 - 0
EXIT 1 - TN Secondary 48: 1.5 - 1.5
EXIT 4 - US 79 (TN Primary 13):  2.8 - 4.3
EXIT 8 - TN Secondary 237: 3.6 - 7.9
EXIT 11 - TN Primary 76: 2.7 - 10.6
Montgomery/Robertson Co Line: 6.6 - 17.2
EXIT 19 - TN Secondary 256: 2.0 - 19.2
EXIT 24 - TN Primary 49: 5.3 - 24.5
Robertson/Cheatham Co Line: 0.9 - 25.4
Cheatham/Robertson Co Line: 0.7 - 26.1
Robertson/Cheatham Co Line: 2.4 - 28.5
EXIT 31 - TN Secondary 249: 2.6 - 31.1
Cheatham/Davidson Co Line: 1.0 - 32.1
EXIT 35 - US 431 (TN Secondary 65): 3.0 - 35.1
EXIT 40 - TN Secondary 45: 5.6 - 40.7
EXIT 43AB - TN Primary 155: 2.9 - 43.6
EXIT 44 - I-65 North: 1.4 - 45.0
(I-65 EXIT 87) - US 431 (TN Secondary 65): 1.3 - 46.3
EXIT 46 - I-65 South: 1.0 - 47.3
EXIT 47AB - Jefferson St: 1.1 - 48.4
EXIT 48 - US 31, US 41: 0.4 - 48.8
EXIT 49 - Shelby Ave: 0.4 - 49.2
EXIT 50 - I-40 West: 0.9 - 50.1
(I-40 EXIT 212 West) - US 70 (TN Secondary 24): 0.3 - 50.4
(I-40 EXIT 212 East) - Fesslers Ln: 0.7 - 51.1
EXIT 52B - I-40 East: 1.0 - 52.1
EXIT 52: US 40, US 70S (TN Primary 1): 0.2 - 52.4
EXIT 53 - I-440: 0.7 - 53.1
EXIT 54 - TN Primary 155: 1.2 - 54.3
EXIT 56 - TN Secondary 255: 2.1 - 56.4
EXIT 57 - Haywood Ln: 1.3 - 57.7
EXIT 59 - TN Primary 254: 2.4 - 60.1
EXIT 60 - Hickory Hollow Pkwy: 0.7 - 60.8
EXIT 62 - TN Secondary 171: 2.3 - 63.1
Davidson/Rutherford Co Line: 0.6 - 63.7
EXIT 64 - Waldron Rd: 1.2 - 64.9
EXIT 66 - TN Secondary 266: 2.0 - 66.9
EXIT 70 - TN Secondary 102: 3.0 - 69.9
EXIT 74AB - TN Primary 840: 4.7 - 74.6
EXIT 76 - Manson Pike, Medical Center Pkwy: 1.6 - 76.2
EXIT 78AB - TN Primary 96: 1.8 - 78.0
(Future) EXIT 80 - TN Secondary 99: 1.8 - 79.8
EXIT 81 - US 231 (TN Primary 10): 1.5 - 81.3
EXIT 84 - Joe B Jackson Pkwy: 2.3 - 83.6
EXIT 89 - Epps Mill Rd: 5.3 - 89.1
Rutherford/Bedford Co Line: 7.5 - 96.6
Bedford/Coffee Co Line: 0.5 - 97.1
EXIT 97 - TN Primary 64: 0 - 97.1
EXIT 105 - US 41 (TN Secondary 2): 8.4 - 105.5
EXIT 110 - TN Primary 53: 5.0 - 110.5
EXIT 111 - TN Primary 55: 1.0 - 111.5
EXIT 114 - US 41 (TN Secondary 2): 2.5 - 114.0
EXIT 117 - Arnold Center Rd: 3.5 - 117.5
Coffee/Grundy Co Line: 9.7 - 127.2
EXIT 127 - US 64 (TN Primary 50): 0.5 - 127.7
Grundy/Marion Co Line: 6.8 - 134.5
EXIT 134 - US 41A (TN Primary 15): 0 - 134.5
EXIT 135 - TN Secondary 2 North: 1.4 - 135.9
EXIT 143 - TN Secondary 2 South: 7.0 - 142.9
EXIT 152 - US 72 (TN Primary 27): 9.1 - 152.0
EXIT 155 - TN Primary 28: 3.6 - 155.6
EXIT 158 - TN Secondary 27: 3.1 - 158.7
EXIT 161 - TN Secondary 156: 2.7 - 161.4
Marion/Hamilton Co Line: 5.5 - 166.9
TN/GA STATE LINE: 0.3 - 167.2
EXIT 167 - I-59: 1.4 - 168.6
EXIT 169 - GA 299: 2.1 - 170.7
GA/TN STATE LINE: 0.6 - 171.3
EXIT 174 - US 41, US 64, US 72 (TN Secondary 2): 2.9 - 174.2
EXIT 175 - Browns Ferry Rd: 1.2 - 175.4
EXIT 178 East - I-124, US 27, US 41 (TN Secondary 2): 3.4 - 178.8
EXIT 178 West - I-124, US 27, TN Secondary 58: 0.6 - 179.4
EXIT 180A East - Central Ave: 0.6 - 180.0
EXIT 180 - US 27 (TN Primary 27): 0.6 - 180.6
EXIT 181 - 4th Ave: 0.7 - 181.3
EXIT 181A - US 41, US 76 (TN Secondary 8): 0.5 - 181.8
EXIT 183 - Germantown Rd: 1.5 - 183.3
EXIT 183A - Belvoir Ave: 0.5 - 183.8
EXIT 184 - Moore Rd: 0.8 - 184.6
EXIT 185 - I-75, US 74: 1.2 - 185.8
 Creation:  First appeared in 1939 as part of the long-term national planning leading to the Interstate system.  Was numbered as I-24 in August, 1957.
Adjustments:  As originally planned, I-24 was to have only run from Nashville to Chattanooga.  An extension northwest of Nashville through Kentucky and into Illinois was approved in October, 1957.
Also, as originally planned, I-24 would not have briefly dipped into the northwest corner of Georgia like it does today, but instead stay within Tennessee in this area.  This change to have I-24 dip into Georgia appears to have been made in 1958.
By the end of 1966, I-24 was completed through Chattanooga and west to the Georgia dip.
Also by the end of 1966, a segment through Nashville opened, and drivers could go from the 24/65 split in northern Nashville to I-40 East.
West of the Georgia dip to Manchester (excluding Monteagle Mountain) was completed by the end of 1968.
Also in 1969, the segment around Manchester opened, from Exit 105 to Exit 114.
Most of I-24 between Old Hickory Blvd and Manchester opened during the course of 1970, except between TN 64 and US 41 at Exit 105, which opened in December, 1971.
The last segment between Nashville and Chattanooga, the Monteagle Mountain grade, was completed ca. 1972.
Construction northwest of Nashville was finally underway by the mid-70s.  The first segment to open was from the Kentucky line to US 79, opened in early 1976.
By the end of 1976, that completed segment was extended east to TN 49.
The last segment of I-24 in Tennessee, from TN 49 to I-65, was completed in January, 1978.
Billy Riddle reports that the Monteagle Mountain grade was reconstructed to its present-day condition in the late 1980s.
Billy also reports that the segment near downtown Chattanooga, including the I-124 interchange, was reconstructed around 1993.
New Interchanges:  Several new interchanges that were not part of the initial segments of I-24 have been added over the years.  Below is a rough breakdown by location, exit number, and year completed:
TN 255/Harding Place, Exit 56, around 1970.
TN 266, Exit 66, mid-1970s (ca. 1976).
Hickory Hollow Pkwy, Exit 60, around 1978.
TN 28, Exit 155, ca early-1980s.
I-440, Exit 53, around 1986.
TN 840, Exit 84, ca 1996 (fully open around 2002).
Joe Jackson Pkwy, Exit 84, opened in 2002.
Manson Pike/Medical Center Pkwy, Exit 76, opened in 2005.
A new interchange at TN 99 in Murfreesboro is under construction.
Posting:  Fully posted
Comments:  One unique aspect of I-24 is the short dip into Georgia.  Though this "Georgia dip" is maintained by GDOT, it retains I-24's Tennessee mileage/mileposts/exit numbers.
The inside lane along I-24 from TN 255/Harding Place southeast to Manson Pike/Medical Center Pkwy is HOV-2 during peak periods.  At about 20 miles long, this is a significant length of HOV lane, and is one of three HOV lane sets in the Nashville area.
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Page last modified 25 November, 2006