If you're interested in all the roads in a particular town in Connecticut, here's your starting point. Eventually all 169 towns will have a page, listing present routes, past routes, and even proposed routes that did not pan out.
If a town is not linked, there's no page for it yet. If a town has an asterisk, its page has more detail than just a list of routes: for example, Killingly roads, where the intersection of US 6 and CT 12 is discussed.