Interstate 393
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| Route information | ||||
| Maintained by NHDOT | ||||
| Length: | 4.594 mi (7.393 km) | |||
| Existed: | 1979 – present | |||
| Major junctions | ||||
| West end: |
 US 202 in Concord
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  I‑93 / US 4 in Concord |
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| East end: |
 US 4 / US 202 / NH 9 in Pembroke
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Interstate 393 (abbreviated I-393) is a 4.594-mile (7.393 km) spur extending east from Interstate 93 at Concord, New Hampshire, USA. The primary purpose of the road is to bypass a densely built commercial strip on Route 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. The entire length of I-393 overlaps US 4 and US 202.
Interstate 393 begins at I-93's exit 15 interchange, where US 4 East leaves its concurrency with I-93 South and the I-393/US 4/US 202 concurrency begins. The four-lane freeway actually begins a short distance west of I-93 at the north end of Concord's Main Street where US 202 turns east from US 3. From there the road then intersects Commercial Street just before the exit 15 interchange. Just east of the exit 15 cloverleaf is I-393's exit 1 to Fort Eddy Road. This exit provides access to NHTI, Concord's Community College, which is home to the McAuliffe-Shepard Discovery Center, an air and space science center. I-393 crosses the Merrimack River and continues east to exit 2, connecting to New Hampshire's State Office Park East and the area known locally as the Concord Heights via East Side Drive (NH 132). Further east is exit 3, I-393's last, to New Hampshire Route 106, which runs south past the commercial area around the Steeplegate Mall, and north to New Hampshire Motor Speedway and the Laconia region. After exit 3, the road turns northward, crossing the Soucook River. Beyond the bridge, I-393 ends and US 4 and US 202 merge down to a single lane before joining NH 9 and continuing eastward.
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