The general public should never hear about secret routes, but they sometimes show up on maps, and a few road signs have even gone up.

This page discusses some of the more interesting routes in the 600s. In the current numbering system, these are found in the east and southeast areas of the state.

See also: selected 400's, selected 500's, selected 700's, selected 800's, selected 900's, or the complete list (400-999).

3.54 miles; Boston Hill Road; from Route 85 in Hebron to Route 316 in Andover. I recommend making this part of a new Route 88, for proximity to routes 85 and 87.

0.11 miles; SR 661 is used for a new bridge over the Willimantic River in Windham. Informally called the "Frog Bridge," the $13 million, four-lane bridge is officially called the "Thread City Crossing," an homage to Willimantic's industrial past as a leading thread manufacturer.

For more information, see: Frog Bridge.

5.7 miles; Snake Meadow Road, from Route 14 in Plainfield to US 6 in Killingly. Longer than several "real" routes, SR 664 still shows up on Rand McNally's road atlas.

1.41 mi; the Montville Connector leads from I-395 to Route 32 in Montville. This is the recommended way from Norwich into New London, since I-395 only has a partial interchange at I-95 in Waterford.

The SR 693/I-395 interchange is also incomplete, allowing only 32 north to 395 north and 395 south to 32 south. The state is looking into adding more ramps for other directions, and once looked at extending the freeway across the Thames River to Route 12.

4.49 mi; this freeway, leading from I-395 to US 6 at the Rhode Island state line, is the easternmost segment of the old Connecticut Turnpike. It has two interchanges of its own. As the I-395/US 6 interchange is not complete, SR 695 is used for 395/6 traffic between the east and south.

Not I-695

Its number makes SR 695 seem chosen because it's a present-day spur from I-395; however, that is only a coincidence. The SR 695 number predates I-395 by 19 years. In 1963, it was designated SR 995, as part of a series of Turnpike segments and spurs numbered in the 990s. In 1964, it was renumbered to SR 695, to match the other 600s numbers in its district. I-395 was designated as a replacement of state Route 52 in 1983.

Nevertheless, in January 2000 WFSB-TV (Ch. 3, Hartford) managed to confuse the issue. On a map graphic showing the scene of an accident on SR 695, the station used an I-695 marker.

From 1968 to 1984, SR 695 was envisioned as part of the proposed I-84 route to Providence.