|Maintained by INDOT|
|Length:||4.72 mi (7.60 km)|
|Existed:||2002 – present|
|West end:||I-65 / US 52 near Zionsville|
|East end:||I-465 / US 52 near Zionsville|
Interstate 865 (I-865) is an east–west connector northwest of Indianapolis, Indiana. It was renamed to I-865 in 2002 to prevent I-465 from intersecting with itself. This section was previously known as the Dog Leg, and the mile markers ran from 900 to 905. It is concurrent with U.S. Route 52 for its entire route.
Route description 
I-865 carries traffic from southbound I-65 to both directions of I-465, and traffic from both directions of I-465 to northbound I-65. No access is permitted from northbound I-65 to eastbound I-865, or westbound I-865 to southbound I-65. It has two lanes in each direction for its entire length.
I-865 was originally part of I-465. When the north–south section between I-65 and current I-865 was renamed from Indiana State Road 100 to I-465, an unusual T intersection of all three branches of I-465 resulted at the current junction of I-865 and I-465. The 2002 renaming of the west branch of I-465 to I-865 fixed this problem.
I-865 would more logically be named I-665, though officials decided against it, as it was concluded that 9-1-1 operators might have difficulty determining if a distressed motorist was saying "65" or "665".
Exit list 
I-865 only has interchanges at its eastern terminus at I-465 and its western terminus at I-65. It is one of the few Interstates in the country that has only interchanges at each of its termini and none in between. Other examples include I-587, I-381, I-189, and the Portland, Maine iteration of I-495.
The entire route is in Boone County.
|Eagle Township||0.00||0.00||I-65 north / US 52 west – Gary, Chicago||Western terminus of I-865; Western end of US 52 concurrency; westbound exit and eastbound entrance|
|Zionsville||4.72||7.60||I-465 / US 52 east – Indianapolis, Speedway||Eastern terminus of I-865; eastern end of US 52 concurrency|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
- "Indiana's "New" Interstate: I-865 (press release)". Indiana Department of Transportation. 2002-04-24. Retrieved 2009-03-31.
- Indiana Department of Transportation. "Greenfield District Area Reference Posts". 2004-07-23.
- INDOT Interchange Book - I-865