Toll roads are not a new concept. There were tolls collected in Babylon. Aristotle spoke of them in the ancient world. During the Middle Ages, they were common tools of both official and criminal collection. But now PennDOT is planning to expand its network of toll roads with the Pathways Major Bridge Public-Private Partnership (P3) Initiative — a $1.6 billion to $2.2 billion investment in rehabilitation of up to nine Interstate bridges, announced in November. One of those bridges will be on I-79 where it crosses Route 50. The project also would reconfigure the Bridgeville interchange to a total cost of $120 million to $150 million.