The bridge, a popular link to I-95 and Philadelphia International Airport, has been carrying an average of 56,000 vehicles a day on Penrose Avenue/Industrial Highway (Route 291) over the Schuylkill between South and Southwest Philadelphia, according to PennDOT.
The nighttime closures, needed to set concrete barriers in place, begin tonight at 9:30 with both eastbound lanes until 5:30 a.m.
At 12:01 a.m., the entire bridge will close as westbound lanes also shut down until 5:30 a.m.
The same shutdowns - and detours - are scheduled for Tuesday night into Wednesday morning.
Wednesday night, eastbound will have its last complete closure from 9:30 p.m. to 5:30 a.m.
Starting Thursday morning, all eastbound traffic will be restricted to one lane.
Westbound will have more closures of both lanes: from 10 p.m. to 5:30 a.m. Thursday, next Monday, and Tuesday, Feb. 28.
Starting Feb. 29, both directions will have no more than one lane open around the clock.
Sometimes, if needed, even those single lanes might be closed between midnight and 5 a.m.
The closures are part of a $43 million project to make needed repairs to the 61-year-old span, originally called the Penrose Avenue Bridge.
Besides painting, the work includes "rehabilitating and resurfacing the center truss spans; resurfacing the concrete approach spans; repairing structural steel; replacing expansion joints; repairing concrete piers; replacing guide rail; and replacing damaged pedestrian railings," according to PennDot.
Pedestrians can continue to use the bridge throughout the project.
Eightypercent of the funding comes from the federal government, the rest from the state.
To check traffic conditions, go to http://go.philly.com/traffic or www.511pa.com. Call 511 to check highway conditions.
Contact staff writer Peter Mucha at 215-854-4342 or firstname.lastname@example.org.