PORTSMOUTH, N.H. (AP) — The Memorial Bridge that runs between New Hampshire and Maine is closing during off-peak hours for four days to continue guardrail adjustments.

The closures start at 11 p.m. Monday until 5 a.m. Tuesday. The pattern repeats through 5 a.m. Friday, Feb. 21.

From 7 p.m. to 11 p.m. Monday through Thursday, traffic will be restricted to one alternating lane.

The rest of the time, all lanes of the bridge will be open.

The new, $81 million Memorial Bridge opened last August. It replaced one that opened in 1923 and closed for two years in July 2011 so the replacement project could get underway.

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