Interstate 275 barely clips the southeastern corner of Indiana, but I promised I would make a page covering every Interstate that enters Indiana! Interstate 275 is the freeway forming a complete circumference around Cincinnati as a beltway. Three miles of the west-central portion of Interstate 275 are in the southeast corner of Indiana--that's out of the 84 total miles traversed by the highway. This creates the rare occurrence of a 3-digit Interstate entering a state never touched by its parent route.
Interstate 275 has a single continuous numbering system for its mile markers and exits, starting at the southern junction with Interstate 75 in Kentucky, and increasing as the route proceeds clockwise. Only one of Interstate 275's exits is in the state of Indiana.
Interstate 275 enters Indiana from Kentucky to the south, crossing a bridge over the Ohio River...
Exit 16 is the only exit from Interstate 275 in Indiana; it's a trumpet spur to US Route 50, Greendale, Lawrenceburg, and Aurora; the point where the spur reaches US Route 50 is also the southern end of Indiana Route 1, but this isn't mentioned on the sign...
Interstate 275 just has to curve a little northeasterly to cross back out of Indiana, and that's exactly what it does; after three miles in Indiana, Interstate 275 proceeds northeastward across the Ohio border to flank the northern side of Cincinnati...