Interstate 393 New Hampshire
Overview
Interstate 393 is a spur taking traffic from I-93 and the capital city of Concord to points east along U.S. 4/202. These two routes continue to Portsmouth and Rochester, respectively. The freeway bypasses Concord Municipal Airport (CON) and the commercialized corridor along NH 9 (former U.S. 4/202) to the north.
Mileage by State
| New Hampshire | 4.60 mi |
Data Sources
December 31, 2021 Interstate Route Log and Finders List
History
The Federal Highway Administration (FHWA) approved the addition of the 3.5 mile long spur route in Concord to the Interstate System on October 31, 1974 under the provisions of 23 U.S.C. 103(e)(1). The designation of Interstate 393 was approved by the American Association of State Highway Officials (AASHTO) on July 13, 1976.
The freeway spur initially ran east from the preexisting cloverleaf interchange between I-93 and the U.S. 3-4-202 connector to NH 9 (Loudon Road) in August 1981.1 The route was proposed to extend east from Concord to the Spaulding Turnpike in 1983, but that extension was dropped in favor of upgrading New Hampshire Route 101 to a freeway between I-93 and I-95.2 That left construction of the eastern leg of I-393 beyond NH 106, which opened in December 1988.3
East End 
‐ Pembroke, NH
East at
I-393/U.S. 4-202 proceed east from the diamond interchange (Exit 3) with NH 106 (Sheep Davis Road) across the Soucook River to converge with NH 9 (Dover Road). 10/06/14
West at
U.S. 4/202 and NH 9 (Dover Road) split at a wye interchange with Interstate 393 at the Chichester and Pembroke town line. 08/21/21
West End 
‐ Concord, NH
West at
I-393/U.S. 4-202 lower across the Merrimack River ahead of Exit 1 for College Drive. 10/06/14
North at
U.S. 3/202 (N Main Street) intersect Washington Street just ahead of their split at I-393 in Concord. 07/30/07
South at
U.S. 3 (Bouton Street) south intersects the west end of I-393 at N Main Street. I-393/U.S. 202 provide a direct connection to I-93 and U.S. 4 to the immediate east. 07/30/07
East at
Commercial Street ties into the eastbound lanes of I-393/U.S. 202 at a RIRO (right in right out) intersection preceding the cloverleaf interchange with Interstate 93 and U.S. 4 west. 07/30/07
North at
Interstate 93 advances north through the diamond interchange (Exit 14) with NH 9 to Exit 15 for I-393/U.S. 4-202. Interstate 393 comprises a spur west to U.S. 3 (N Main Street) and east along side U.S. 4/202 to the town of Chichester. 10/06/14
South East at
I-93/U.S. 4 head one mile south from Exit 16 at Portsmouth Street to I-393/U.S. 202 in Concord. 06/27/05
References
- Briefs about New Hampshire. (1982, January 4). The Telegraph.
- East-west highway study is proposed. (1983, February 22). The Telegraph.
- New Hampshire Highways. (May 2004). 100th Anniversary Series Part III - The Interstate Highway System. Retrieved from http://www.nhgoodroads.org/UploadedFiles/Files/InterstateHihgwaySystem.pdf