I-40 (TN)
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| Route information | ||||
| Maintained by TDOT | ||||
| Length: | 455.28 mi (732.70 km) | |||
| Major junctions | ||||
| West end: |
 I-40 at Arkansas state line |
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  I-69 / I-240 in Memphis I-269 near Memphis I-840 near Burns I-440 in Nashville I-65 in Nashville I-24 in NashvilleI-840 in Lebanon I-140 in Knoxville  I-75 / I-640 in Knoxville I-275 in Knoxville I-81 in Dandridge
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| East end: |
I‑40 at North Carolina state line |
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| Location | ||||
| Counties: | Shelby, Fayette, Haywood, Madison, Henderson, Carroll, Decatur, Benton, Humphreys, Hickman, Dickson, Williamson, Cheatham, Davidson, Wilson, Smith, Putnam, Cumberland, Roane, Loudon, Knox, Sevier, Jefferson, Cocke | |||
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Interstate 40 (I-40) traverses the entirety of the state of Tennessee from west to east, running from the Mississippi River at the Arkansas border to the northern base of the Great Smoky Mountains at the North Carolina border. The road connects Tennessee's three largest cities—Memphis, Nashville, and Knoxville—and crosses all of Tennessee's physiographical provinces and Grand Divisions—the Mississippi Embayment and Gulf Coastal Plain in West Tennessee, the Highland Rim and Nashville Basin in Middle Tennessee, and the Cumberland Plateau, Appalachian Valley and Ridge Province, and Blue Ridge Province in East Tennessee. The Tennessee section of I-40 is 455 miles (732 km) long, the longest of any state.
I-40 enters Tennessee from Arkansas via the Hernando de Soto Bridge, which spans the Mississippi River at river mile 736. The Interstate passes across the southern half of Mud Island before crossing the Wolf River Harbor into downtown Memphis. At the I-240 interchange, I-40 abruptly turns north, following the route redesignated due to the Overton Park controversy in the 1970s. I-40 crosses the Wolf River three times in Memphis, as the road passes near the neighborhoods of Frayser and Raleigh and turns back onto the original routing of I-40 (the western continuation of what would have been I-40 at this point is known as Sam Cooper Boulevard).
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Wikipedia