Interstate 55 in Tennessee

I-55 northbound as it enters Tennessee in Memphis.

I-55 northbound, at intersection with I-240 in Memphis. Note I-240 is signed as North as opposed to West.

I-55 enters Tennessee from Mississippi, heading north to an interchange with Interstate 240. I-55 then turns westward for a brief period before turning northward again. Just before reaching downtown, the highway turns westward again at E.H. Crump Boulevard and crosses the Mississippi River via the Memphis-Arkansas Bridge into West Memphis, in Crittenden County, Arkansas.

I-55 provides an alternate route for motorists who do not want to take Interstates 240 and 40 through downtown to cross the Mississippi River.

The Memphis and Arkansas Bridge, the first link of what is now I-55, was integrated into the interstate system. Construction began on September 12, 1945, and the bridge opened to traffic on December 17, 1949.[2][3] The first segment of I-55 to begin construction after the passage of the Interstate Highway Act of 1956 was the section between the Mississippi State Line and Brooks Road/US 51 in early 1959. This segment opened to traffic on December 2, 1961, and was the first completed freeway segment in Memphis.[4] On March 18, 1966, the section between I-240 and US 61 was opened.[5]

I-55 was widened from four to eight lanes between the Mississippi state line and the I-240 interchange in two phases. The first phase, which took place between February 1999 and June 2001, widened the section between Winchester Road and I-240, and the second phase, which ran from early 2000 to July 2002, widened the highway between the state line and Winchester Road.[6]

On January 18, 2008, the Federal Highway Administration authorized the states of Mississippi and Tennessee to extend I-69 from the I-40/TN 300 interchange in north Memphis to the I-55/I-69 interchange in Hernando; however, Tennessee has not yet signed the extension of the route, although Mississippi has already done so.[7] Interstate 55 is one of Tennessee's interstates where the speed limit is 65 mph (105 km/h) instead of 70 mph (110 km/h).

There are currently plans to revamp the I-55/Crump Boulevard Interchange. The current design (a cloverleaf interchange) causes northbound motorists, especially truck drivers, to slow down from 55 MPH to 25 MPH when going from the section they are on to the section passing over the Mississippi River. Prior to 2011, northbound traffic had to merge on a one-lane loop with a tight radius while traffic going from I-55 SB to Riverside Drive merged into traffic on another loop ramp. This has caused several accidents over the years. A temporary solution has been put into effect by making the NB loop into two lanes, eliminating the I-55 SB to Riverside Drive loop, and creating a left turn lane for the I-55 SB to Riverside Drive traffic. This eliminates having to make a lane change in order to stay on I-55 NB.

A project creating a permanent solution is being planned. The cloverleaf will be eliminated entirely and two flyover ramps will be added, thus creating free-flow traffic for the mainline interstate. A roundabout will be created in place of the cloverleaf for Riverside Drive traffic, E.H. Crump Boulevard traffic, and the I-55 entrance/exit ramps.[8] The project, originally scheduled to begin in 2018, is on hold due to controversy over the nine-month closure of the Memphis & Arkansas Bridge during the project. As of 2021, the interchange has not been changed.

The entire route is in Shelby County.

Location	mi[1]	km	Exit	Destinations	Notes
Tennessee–Mississippi line	0.00	0.00	I-55 / I-69 continue south into Mississippi
			291	Southaven	Southbound exit and northbound entrance each extend into Tennessee; exit number is based on Mississippi mileage
Memphis	1.5	2.4	2	SR 175 (Shelby Drive) – Whitehaven, Capleville	Signed as exits 2A (east) and 2B (west) southbound
	4.4	7.1	5	US 51 (Elvis Presley Boulevard, SR 3) / Brooks Road – Graceland	Signed as exits 5A (Brooks Road) and 5B (US 51 south) southbound
	5.5	8.9	6	I-240 – Nashville, Little Rock, Memphis International Airport	Signed as exits 6A & 6B; I-240 North and West, exit 25; I-55 and I-240 change carriageways; future northern end of I-69 overlap
	7.5	12.1	7	US 61 (3rd Street, SR 14) – Vicksburg, Mississippi	No access from southbound US 61 to northbound I-55 or southbound I-55 to northbound US 61
	8.2	13.2	8	Horn Lake Road	Southbound exit and northbound entrance
	8.9	14.3	9	Mallory Avenue
	10.4	16.7	10	South Parkway
	11.0	17.7	11	McLemore Avenue - President's Island
	11.7	18.8	12A	Crump Boulevard east ( US 61 south / US 64 / US 70 / US 79 / SR 1 east)	South end of US 61/US 64/US 70/US 79/SR 1 overlap; left exit southbound and left entrance northbound; 25 mph (40 km/h) advisory speed for ramps carrying I-55 in both directions
	11.9	19.2	12B	Riverside Drive - Downtown	left exit and left entrance southbound
	12.2	19.6	12C	Metal Museum Drive	Serves the National Ornamental Metal Museum; right-in/right-out southbound
Mississippi River	12.6	20.3	Memphis & Arkansas Bridge; Tennessee–Arkansas state line; north end of SR 1 overlap
				I-55 north (US 61 north / US 64 / US 70 / US 79 west) – West Memphis, St. Louis, Little Rock	Continuation into Arkansas
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Incomplete access