LOCATIONS. Pittsburgh, Harrisburg, or Philadelphia. ABOUT US. The Major Bridges P3 Initiative is part of the PennDOT Pathways Program, which is designed to bolster PennDOT’s ongoing effort to address the state’s growing backlog of replacement and rehabilitation needs for major bridges that are approaching the end of their useful life. By allowing for the use of a P3 delivery model, PennDOT will be able to replace or rehabilitate major bridges aro...