- Western Terminus:
- Forbes Avenue (US 1) in New Haven
- Eastern Terminus:
- Short Beach Road (CT 142) in East Haven
- 4.91 miles
- New Haven
CT 337 is a route in New Haven and East Haven. Although it is a signed state route, the majority of it is a two-lane road through residential neighborhoods, with several stop signs. Its route is a loop; although it is designated as an east/west route, it would be more accurately described as running south and then north, or vice versa. It begins at Forbes Avenue (US 1) in New Haven and runs south to Long Island Sound. At the water, it curves to the east for a short distance before coming back north. It ends at Short Beach Road (CT 142) in East Haven.