Route 146, which would make a decent Route 1A, is a state scenic road. The Danbury News-Times wrote:
"Take this 12.2-mile tour through the shoreline towns of Branford and Guilford. Enjoy the cool, sea breezes as you pass salt ponds and scenic marshland. see dreamy summer cottages, magnificent beach front homes, and the popular Thimble Islands just offshore. Or taste the catch of the day at one of our many local restaurants. For all the 'salty dogs' out there, this is one Connecticut road you won't want to miss."
By all means, don't take your 18-wheeler: a railroad overpass along the route will peel the top off anything taller than 8 feet, 8 inches.