The I-95 corridor in Pennsylvania is a complex network of bridge structures and roadway. Of the 51 miles of I-95 in Pennsylvania, 23% are located on bridge structures, with the remaining being at-grade roadway. Both assets are quickly deteriorating and in need of major rehabilitation. Some segments are beyond the point of maintenance. Bridge structures and roadway need to be repaired/reconstructed before they become unsafe and unusable.
A unique feature of I-95 in Pennsylvania is the amount of the corridor that is located on structure. These structures elevate the highway over local roads, rail lines and other local features. In recent years, the condition of the structures has been a major issue as they continue to deteriorate and come to the end of their useful life. The condition of structures in each sector was one of the major factors used to determine their priority for reconstruction.
PennDOT uses a pavement management system to determine the overall condition of highways, including I-95. To do this, PennDOT uses Systematic Technique to Analysis and Manage Pennsylvania’s Pavements (STAMPP), an automated condition survey that collects distressed data about the pavement surfaces such as patching, cracking, rutting, raveling, edge deterioration and weathering. Software is used to analyze the collected data to determine the appropriate pavement maintenance treatment.
Bridge Condition Ratings
PennDOT assigns a condition rating to the deck, superstructure and substructure of bridges on a scale from 0 to 9, with nine being excellent condition. Bridges that have a rating of four or less for any of the listed components are considered to be Structurally Deficient. While this does not mean the bridge is in danger of collapse, it does indicate the need for remedial action.