and New Hampshire Route 101 (NH 101), where I-93 drops to three lanes before adding a fourth and fifth lane back to the freeway after the interchange. The construction to widen I-93 to four lanes each way between the Massachusetts-New Hampshire border and its junction with I-293 and NH 101 was completed in 2021.

I-93 and NH 101 run concurrently for about 1 mi before NH 101 exits to the east as its own freeway, serving Portsmouth