|USS Indianapolis Memorial Highway|
Former routes of U.S. and State highways that are now defunct or routed on I-465 are shown in gray.
|Maintained by INDOT|
|Length:||52.79 mi (84.96 km)|
|Existed:||1959 (completed 1970) – present|
|Beltway around Indianapolis, Indiana|
| I-65 (South Side)
I-70 (Southwest Side)
I-74 (West Side)
I-65 (Northwest side)
I-865 (Northwest Side)
I-69 (Northeast side)
I-70 (East side)
I-74 (Southeast side)
Interstate 465 (I-465), also known as the USS Indianapolis Memorial Highway, is the beltway circling Indianapolis, Indiana, United States. It is roughly rectangular in shape and has a perimeter of approximately 53 miles (85 km). It lies almost completely within the boundaries of Marion County, except for two short sections on the north leg in Boone and Hamilton Counties. It crosses I-65, I-69, I-70 and I-74, and provides additional access to I-65 via I-865. An $800 million project was completed in the fall of 2012 to refurbish the western edge of the loop.
Except for I-65 and I-70, no numbered highways run through downtown Indianapolis. All highways that continue from one side to the other are routed around the city, concurrent with I-465:
- Interstate 74, counterclockwise from exit 16 to exit 49
- U.S. Highway 31, counterclockwise from exit 2 to exit 31
- U.S. Highway 36, counterclockwise from exit 13 to exit 42
- U.S. Highway 40, counterclockwise from exit 12 to exit 46
- U.S. Highway 52, clockwise from exit 25 to exit 47 (originally counterclockwise from exit 20 to exit 48)
- U.S. Highway 421, counterclockwise from exit 49 to exit 27
- State Road 37, counterclockwise from exit 4 to exit 37 (originally only from exit 4 to exit 2)
- State Road 67, counterclockwise from exit 8 to exit 42
- Future Interstate 69, Clockwise from Exit 37 to Exits 3-8 (Proposed Route)
The approximately one-mile section between exits 46 and 47 carries eight routes — I-465, US 31, US 36, US 40, US 52, US 421, SR 37 and SR 67. It will carry Interstate 69 in the future.
In most cases, markers other than I-74's are not posted along I-465 itself; rather, signs on the onramps direct traffic following a particular route to follow I-465 to a particular exit to continue on that route.
Much of I-465 replaced the routing of the defunct parallel State Road 100.
In 2002, the Interstate 865 designation was created from a portion of I-465 to eliminate the three-way intersection of I-465.
Also in 2002, Indianapolis native David Letterman's late-night talk show sidekick and band leader Paul Shaffer was honored by having a street in Thunder Bay, Ontario, named for him. This led Letterman to ask (on his program) why he couldn't have his own eponymous road, and he suggested I-465 be named the David Letterman Expressway. His fans took the idea seriously, especially in the Indianapolis area where highway signs promoting the idea were displayed. Advertisers and traffic reports started to refer to I-465 as the "DLX", or later the "David Letterman Bypass", a reference to his quintuple heart bypass surgery in January 2000. Letterman even telephoned the Mayor of Indianapolis, Bart Peterson to make his case, but eventually the idea went nowhere.
In 2011 the Indiana General Assembly passed a resolution naming I-465 as "USS Indianapolis Memorial Highway" in "the memory of the brave sailors who lost their lives" when USS Indianapolis was sunk in the Pacific during World War II.
As part of the "Operation Indy Commute" project, INDOT began work in 2013 to widen I-65 on both northbound and southbound roads from Exit 103 at Southport Road northward to the southern junction with I-465. To reduce congestion on I-65 South from I-465 West, the cloverleaf exit from I-465 West to I-65 South was replaced by a flyover overpass to I-65 South. The I-465 East exit to I-65 South was expanded for improved merging with the westbound flyover. Most of this work was completed in late 2014.
|Marion||Indianapolis||0.00||0.00||53||I-65 – Indianapolis, Louisville|
|2.20||3.54||2||US 31 south (East Street) – Greenwood||West/south end of US 31 overlap; signed as exits 2A (north) and 2B (south)|
|4.30||6.92||4||SR 37 south (Harding Street) – Bloomington||West end of SR 37 overlap|
|I-69 south to SR 37 / SR 144 / SR 39 – Bloomington||Proposed I-69 south|
|7.33||11.80||7||Mann Road||Westbound exit and eastbound entrance|
|8.51||13.70||8||SR 67 south (Kentucky Avenue) – Vincennes||West/south end of SR 67 overlap|
|9.32||15.00||9||I-70 – Indianapolis, Terre Haute, Indianapolis International Airport, Plainfield, St. Louis||Signed as exits 9A (east) and 9B (west); Exit 73 on I-70|
|10.48||16.87||11||Sam Jones Expressway|
|11.77||18.94||12||US 40 west (Washington Street) – Terre Haute, Plainfield||West end of US 40 overlap|
|12.91||20.78||13||US 36 west (Rockville Road) – Avon, Danville, Rockville||West end of US 36 overlap|
|16||I-74 west / US 136 west (Crawfordsville Road) – Peoria||West end of I-74 overlap; eastern terminus of US 136; signed as exits 16A for US 136 and 16B for I-74|
|19.03||30.63||19||56th Street||Northbound exit and southbound entrance|
|19.80||31.87||20||I-65 – Indianapolis, Gary, Chicago||Directional access (northbound to northbound and southbound to southbound) only|
|21||71st Street, 73rd Street||Exit to 73rd Street northbound only|
|25||I-865 west / US 52 west to I-65 north – Chicago||West end of US 52 overlap|
|Marion||Indianapolis||26.42||42.52||27||US 421 north (Michigan Road) – Michigan City||West/north end of US 421 overlap|
|Hamilton||Carmel||30.27||48.71||31||US 31 north (Meridian Street) – South Bend||East/north end of US 31 overlap|
|Marion||Indianapolis||32.87||52.90||33||Keystone Avenue (Former SR 431)|
|36.50||58.74||37||I-69 (Binford Boulevard) / SR 37 north – Fort Wayne, Muncie||East end of SR 37 overlap; signed as exits 37A (south) and 37B (north) westbound; no access from westbound I-465 to southbound Binford Boulevard or northbound Binford Boulevard to eastbound I-465; I-69 south exit 200|
|38.83||62.49||40||Shadeland Avenue; 56th Street||Directional access (northbound to northbound and southbound to southbound) only for Shadeland Avenue, which also serves as a collector-distributor lane for 56th Street exit|
|Lawrence||41.05||66.06||42||US 36 east (Pendleton Pike) / SR 67 north – Pendleton||East/north end of US 36 / SR 67 overlap|
|Indianapolis||43.43||69.89||44||I-70 – Indianapolis, Dayton||I-70 east exit 89, west exit 90. Signed as exits 44A (east) & 44B (west) northbound.|
|45.27||72.86||46||US 40 east (Washington Street) – Richmond||East end of US 40 overlap|
|46.81||75.33||47||US 52 east (Brookville Road) - Cincinnati||East end of US 52 overlap|
|47.27||76.07||48||Shadeland Avenue||Northbound exit and southbound entrance|
|48.33||77.78||49||I-74 east / US 421 south (Southeastern Avenue) – Cincinnati||East/south end of I-74 / US 421 overlap|
|Beech Grove||51.40||82.72||52||Emerson Avenue|
|Indianapolis||52.79||84.96||53||I-65 – Indianapolis, Louisville||Signed as exits 53A (north) and 53B (south)|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
Eventually, Interstate 69 will run concurrent with the south and east legs of Interstate 465 around Indianapolis from the current south end to somewhere between exits for State Road 37 and State Road 67 on the south side.
- Reference Post Book (PDF). Indianapolis: Indiana Department of Transportation. 2004. I-465.
- Indot: Accelerate 465
- 1969 Indianapolis map (note that the highlighting is wrong, as exit 47 was a partial interchange, so US 52 had to use exit 48 and Shadeland Avenue (State Road 100))
- "USGS 1984 map". Retrieved 5 October 2014.
- US 31/I-465: Photo shows how US 31 is marked as it joins I-465 (looking east, Illinois and Indiana Highway Ends, ca. 2005), retrieved 2009-05-17 Check date values in:
- "IndyStar: I-465 gets new name". Indianapolis Star. Retrieved 5 October 2014.
- "OPERATION INDY COMMUTE - I-65 & I-465 SOUTH". Indiana Department of Transportation.