page_title: New Hampshire Route 12
section_title: New Hampshire Route 12A
hierarchical_section_title: New Hampshire Route 12 / New Hampshire Route 12A
caption_attribution_description: Signs along the concurrency of New Hampshire Routes 12A and 123.
context_page_description: New Hampshire Route 12 is a 62.773-mile long north-south state highway in southwestern New Hampshire. Its southern terminus is at the Massachusetts state line in Fitzwilliam, where it continues south as Massachusetts Route 12. Its northern terminus is at the Vermont state line in Claremont, where it continues north as Vermont Route 12. Most of the northern part of NH 12 runs along the Connecticut River.
  Its number is derived from its original 1922 designation as New England Interstate Route 12. Present-day Vermont Route 12, New Hampshire Route 12, Massachusetts Route 12 and Connecticut Route 12 still mostly follow the original route. The 283.3-mile four-state series of State Route 12s extend from Morrisville, Vermont to Groton, Connecticut.
context_section_description: New Hampshire Route 12A is a designation held by two state highways which bypass separate sections of NH 12. Although not directly connected, the two segments are linked by an 8.2-mile (13.2 km) section of NH 12 in Charlestown.
caption: Route 12A and Route 123 concurrency
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