When I-393 was first completed circa 1979, it ended at an at-grade intersection with NH 9 and NH 106 just west of where exit 3 now stands.
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Further east is exit 3, I-393's last, to New Hampshire Route 106, which runs south past the commercial area around the Steeplegate Mall, and north to New Hampshire Motor Speedway and the Laconia region.
Hampshire | New Hampshire | Stockbridge, Hampshire | Concord, New Hampshire | Hampshire County Cricket Club | U.S. Route 66 | Exeter, New Hampshire | Manchester, New Hampshire | U.S. Route 1 | Hanover, New Hampshire | Portsmouth, New Hampshire | Andover, Hampshire | University of New Hampshire | U.S. Route 6 | U.S. Route 101 | Route 66 | U.S. Route 30 | New Jersey Route 4 | Keene, New Hampshire | European route E65 | U.S. Route 40 | California State Route 1 | U.S. Route 1 in Maine | Pennsylvania Route 309 | European route E18 | U.S. Route 23 | Peterborough, New Hampshire | Hambledon, Hampshire | Goffstown, New Hampshire | European route E4 |