CSP: Broad Street Interchange

Summary of Study Challenges

  • Minimize the impact to existing rail lines and FDR Park
  • Understand that much of the land surrounding the interchange is within the 100-year floodplain
  • Support the economic development of the Navy Yard by increasing the interchange capacity, identifying new access points, and promoting improved multi-modal access
  • Maintain the exit circulation in the Stadium District
  • Connection to Terminal Avenue creates operational issues at the Broad Street interchange

Interchange: Design Concepts

Three different levels of design concepts were developed for the Broad Street Interchange that balance the study’s needs, the extent of potential impacts, and potential costs.

We have defined each design concept of LOW, MEDIUM, and HIGH.

Each design concept presents a different solution and potential tradeoffs on the surrounding safety, traffic, connectivity, multimodal services, and socioeconomic, cultural, and natural resources.

Video of Design Concepts

Broad Street Interchange: Low Impact Design Concept

Broad Street Interchange: Medium Impact Design Concept

Broad Street Interchange: High Impact Design Concept

Impacts on Safety and Congestion

Safety Challenges

  • Shoulder Widths: Existing shoulder widths are below modern safety design standards.
  • Merging Lanes: The length of ramp merging lanes is below modern safety design standards. These conditions impact safety in the corridor.

Congestion Challenges

  • Highway Lanes: Traffic analysis indicates that congestion will increase by 2045 along the stretch of I-95 between the Broad Street and Walt Whitman Interchanges if the highway is left in its current configuration, particularly affecting the Navy Yard, PhilaPort, and event traffic.
  • Broad Street Exit: Traffic analysis indicates that congestion will increase by 2045 at Broad Street Exit if the highway is left in its current configuration. Specifically, the northbound I-95 off-ramp to Broad Street is a challenge. Traffic trying to reach the Navy Yard is currently required to U-turn on Broad Street after existing I-95.


Connectivity and Multimodal Services

Connectivity Challenges

  • Broad Street Interchange: As the primary entrance to the Navy Yard, the capacity of the Broad Street Interchange potentially limits future expansion.
  • Additional Access: Existing connections to PhilaPort and the Stadium District are also limited in capacity as development and vehicle demands increase.

Multimodal Challenges

  • Pedestrian/Bicycle: Limited through streets and existing highway ramps hinder safe access for pedestrians and bikes on Front and 7th streets.
  • Freight Movement: Higher than average percentage of trucks and freight traffic due to the proximity to PhilaPort and other industrial uses.
  • Transit: Lack of dedicated transit lanes forces transit to share roadway with all vehicles and limits access to the Navy Yard.

Socioeconomic, Cultural, Natural Resources

Socioeconomic Challenges

  • Economic Growth: The Navy Yard, PhilaPort, and Stadium District are regionally significant economic drivers that have planned growth that will impact traffic needs.

Cultural Challenges

  • FDR Park: FDR Park was added to the National Register of Historic Places in 2000 and has recently completed a master plan to reimagine the historic Olmstead-designed park.

Natural Resource Challenges

  • FDR Park: Proximity of FDR Park to the Broad Street Interchange.
  • Floodplains/Emergency Management: Land adjacent to the Broad Street Interchange is in the 100-year floodplain and susceptible to flooding during major storm events.