Connecticut State Route 12 is a north-south highway in Eastern New London County. It runs from U.S. Rt. 1, at Groton, to the New London/Windham County Line, at Plainfield. CT St Rt 12 passes through the following towns in New London County. Groton Ledyard Preston Norwich Lisbon Griswold CT St Rt 12 is multi-plexed in New London County. Connecticut State Route 2A, at Preston. Connecticut State Route 2, at Norwich. Connecticut State Route 138, from Lisbon to Griswold. CT St Rt 12 intersects the following highways in New London County. U.S. Rt. 1, at Groton. Interstate 95, at Groton. Connecticut State Route 184, at Groton. Connecticut State Route 214, at Ledyard. Interstate 395, at Preston. Connecticut State Route 2A, at Preston. Connecticut State Route 2A, ,at Preston. Connecticut State Route 2, at Norwich. Connecticut State Route 2, at Norwich. Connecticut State Route 97, at Norwich. Interstate 395, at Lisbon. Connecticut State Route 138, at Lisbon. Connecticut State Route 138, at Griswold. Connecticut State Route 201, at Griswold.
A guide marker for CT St Rt 12/184. Photo from: Paul Dienhart A guide marker on NB U.S. Rt. 1. Photo from: Paul Dienhart
