PennDOT is planning intermittent traffic stoppages this weekend on Interstate 81 northbound at the Route 22/322 interchange near Harrisburg.
Construction crews will be setting new beams for the Route 22 eastbound bridge over I-81's northbound lanes early Saturday and early Sunday.
New beams over the southbound side of I-81 were installed earlier this week.
The work will be done each morning between midnight and 5 a.m.
If setting the bridge beams is not complete, the work will continue from midnight Monday to 5 a.m. Tuesday.
Northbound motorists will have the option to detour around the stoppages by exiting at Cameron Street, then following Elmerton Avenue and Progress Avenue back to northbound I-81 at Exit 69.
The southbound ramp to Route 22 eastbound will be closed during the work, since the ramp is below the construction area.
The Route 22 eastbound bridge was severely damaged by a huge tanker truck fire May 9.
The new bridge, which cost $3.3 million, is scheduled to be open by mid-November.