The shuttle service operating during the Memorial Bridge closure has expanded for the remainder of the summer. For three days each week, two shuttles will run between Portsmouth and Kittery in the afternoons and evenings.

In addition to the year-round shuttle, which runs hourly from 5 a.m. to 1 a.m. seven days a week, a second shuttle now operates on Thursdays, Fridays and Saturdays, departing Kittery every hour from 12:30 to 11:30 p.m., and Portsmouth every hour from 1 p.m. to 12 a.m. The new service will continue through Labor Day, Sept. 3.

The shuttle service is running while crews build a replacement for Memorial Bridge, which is slated for completion in July 2013. Each shuttle has capacity for 12 passengers and seven bicycles. They depart from just north of Warren’s Restaurant in Kittery and at the intersection of Daniel and Bow streets in Portsmouth.