 The Delaware Expressway was approved in 1945 as a toll road that was to be part of the Pennsylvania Turnpike system until the project was turned to the Pennsylvania Department of Highways in 1956, with the expressway to be included in the Interstate Highway System as part of I-95.Construction on I-95 began in 1959 and was mostly complete by 1979, with the final portion near the Philadelphia International Airport finished in 1985.The route was originally projected to run through the center of Trenton, New Jersey, but was rerouted to the Scudder Falls Bridge due to limited capacity in Trenton.