While I-95 is set to reopen with six temporary lanes today, there is no official timeline for the full reconstruction. Officials have said they expect it to take months. Via the Philadelphia Inquirer:

“We will give an update on the timeline of a permanent fix after the temporary fix is done,” Gov. Josh Shapiro said Tuesday.

Once I-95 is reopened over the temporary six-lane bridge, crews will rebuild the outer sections of the bridge. Once completed, traffic will be diverted to those four lanes — two in each direction — as the recycled glass aggregate is removed and the inner sections of the bridge are built.

Once completed, I-95 will fully reopen with four lanes in each direction.

[...] Sixteen I-beams will be laid across the supporting concrete walls on either side of the Cottman Avenue exit ramp. Then an 8½-inch-thick bridge deck, made from sturdy, steel-reinforced concrete, will be placed on top, Din Abazi, chief bridge engineer for PennDot District 6, told The Inquirer.

You can watching the reopening at noon today EST: