I-193 (numbered as another interstate)  New Hampshire (link)

Interstate 193 is an old numbering (1962, 1965) for the north-south portion of what is now I-293.

I-293  New Hampshire (link)

11.18 miles [1]; western loop of I-93 in Manchester. The vertical section of Interstate 293 follows the Everett Turnpike, though tolls are waived in that area.

See also: I-293 photos (Alexander R Svirsky)

I-393  New Hampshire (link)

4.60 miles [1]; spur off I-93 to the east in Concord.

The original section, built around 1979, used to end at a T intersection with US 4/202 and NH 9, about a mile west of NH 106.

Construction on the extension toward Chichester lasted from 1985-1988. In 1992, routes 4/202/9 were widened to three lanes from the end of I-393 to Epsom Circle at NH 28, probably indicating that there are no plans to extend Interstate 393 further. [2]

See also: I-393 photos (Alexander R Svirsky)

Sources

1. Route Log and Finder List - Interstate Highways, FHWA, Oct. 31, 2002.
2. Svirsky, Alexander R. "I-393 and I-293 in N.H." Personal email, June 8, 2001.