pton . ▁The ▁road ▁has ▁a ▁length ▁of ▁approximately ▁ 4 0 ▁kilom eters , ▁and ▁services ▁small , ▁otherwise ▁isolated ▁rural ▁communities . ▁In ▁these ▁areas , ▁the ▁highway ▁is ▁often ▁uno fficial ly ▁referred ▁to ▁as ▁" Main ▁ ▁Street ." ▁ ▁The ▁road ▁par alle ls ▁Route ▁ 1 ▁and ▁follows ▁the ▁K enne bec asis ▁River . ▁ ▁The ▁highway ▁starts ▁in ▁Ham pton ▁as ▁Hall ▁Road , ▁then ▁Main ▁Street . ▁ ▁It ▁is ▁also ▁called ▁Main ▁Street ▁in ▁Sus sex . ▁ ▁History ▁ ▁Route ▁ 1 2 1 ▁was ▁commission ed ▁in ▁ 1 9 6 8 ▁when ▁Route ▁ 1 ▁was ▁moved ▁to ▁a ▁new ▁alignment ▁on ▁the ▁south ▁shore ▁of ▁the ▁K enne bec asis ▁River . ▁ ▁Inter sect ing ▁routes ▁ ▁Begin s ▁merged ▁with ▁Route ▁ 1 0 0 ▁over ▁exit ▁ 1 5 8 ▁at ▁Route ▁ 1 ▁in ▁Ham pton , ▁New ▁Brun sw ick ▁separ ates ▁from ▁highway ▁ 1 0 0 ▁on ▁Main ▁St ▁in ▁Ham pton , ▁New ▁Brun sw ick ▁ ▁New ▁Brun sw ick ▁Route ▁ 8 4 5 ▁in ▁Ham pton , ▁New ▁Brun sw ick ▁ ▁New ▁Brun sw ick ▁Route ▁ 8 5 5 ▁in ▁Blo om field , ▁New ▁Brun sw ick ▁ ▁New ▁Brun sw ick ▁Route ▁ 1 2 4 ▁in ▁N orton , ▁New ▁Brun sw ick ▁ ▁New ▁Brun sw ick ▁Route ▁ 8 8 0 ▁in ▁A po ha qui , ▁New ▁Brun sw ick