 Interstate 393 | ||||
|---|---|---|---|---|
 I-393 highlighted in red | ||||
| Route information | ||||
| Auxiliary route of I-93 | ||||
| Maintained by NHDOT | ||||
| Length | 4.6 mi[1] (7.4 km) | |||
| Existed | 1979[citation needed]–present | |||
| NHS | Entire route | |||
| Major junctions | ||||
| West end |    I-93 / US 4 / US 202 in Concord | |||
| East end |  US 4 / US 202 / NH 9 in Pembroke | |||
| Location | ||||
| Country | United States | |||
| State | New Hampshire | |||
| Counties | Merrimack | |||
| Highway system | ||||
| ||||
Interstate 393 (I-393) is a 4.6-mile (7.4 km) east–west auxiliary Interstate Highway extending from I-93 at Concord to Pembroke, New Hampshire. The primary purpose of the road is to bypass a densely built commercial strip on New Hampshire Route 9 (NH 9) in the eastern part of Concord. Several times a year, I-393 also serves traffic to events at New Hampshire Motor Speedway in Loudon. I-393 runs concurrently with US Route 4 (US 4) and US 202 for its entire length.
- ^ Starks, Edward (January 27, 2022). "Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. Retrieved December 13, 2022.