From 2012 to 2015, the I-83 / PA 581 interchange outside of Harrisburg, PA was modified. Formerly, I-83 was reduced to one lane going northbound through the interchange, resulting in frequent traffic jams during peak travel times. The northbound part of the highway was widened, one bridge was replaced and several exits in the vicinity were reconfigured. A second project started in 2016, with work to be completed from its northern terminus at I-81 to just past the Union Deposit Rd. interchange. The project, expected to be completed in 2021, will reconstruct two interchanges and associated overpasses, as well as widen the highway to six through lanes.