skip to content

I-95 Section GIR Noise and Air Quality Analysis

The installation of a clear panel blocks highway noise while retaining residents’ viewscape.
  • I-95 noise and air quality analysis benefits 102,000 vehicles each day-Gannett Fleming

    Section GIR of I-95 is part of an improvement initiative that will benefit 102,000 vehicles daily.

Pennsylvania Department of Transportation

Philadelphia, Pennsylvania

Our Role
Noise Analysis, Public Involvement, Air Quality Analysis, Sound Barrier Design.

In Progress
In Progress
  • Sound barriers significantly reduce highway noise
  • Air quality analysis evaluates impact of traffic in future-build scenario.

Interstate 95 stretches from Florida to Maine, crossing through Pennsylvania‘s Philadelphia area parallel to the Delaware River. The Pennsylvania Department of Transportation (PennDOT) is improving Section GIR of I-95 as part of a long-term, multi-phase initiative that will benefit a daily average of 102,000 vehicles. As the highway is reconstructed, widened, and improved, other enhancements will benefit the neighborhoods and businesses situated along the highway, such as reduced highway noise and improved air quality.

What We Did

As part of the noise abatement program, Gannett Fleming is providing final design noise analyses using Federal Highway Administration Traffic Noise Model 2.5. As part of the noise analyses, noise barriers for use on both at-grade and elevated structures are being designed. Sections of the highway are on viaducts, and the analyses will be used to evaluate abatement potential associated with direct noise path, noise reflections, and noise radiating from the elevated structures.

As part of an extensive public involvement component, Gannett Fleming educated the public using Sounds of Highway, an audio-visual tool that showed the predicted sound levels with and without sound barriers. To accommodate residents’ desire to maintain their viewscape, a clear panel sound barrier was designed that resists graffiti and can be pressure washed. Gannett Fleming also provided preliminary air quality analyses using the U.S. Environmental Protection Agency’s Motor Vehicle Emission Simulator (MOVES) modeling system and the CAL3QHC model to evaluate the impact of traffic in a future-build scenario.

Key Features

  • First partial clear panel sound barrier in Pennsylvania maintains residents’ view of the river
  • Extensive public involvement campaign demonstrated differences in sound levels.

Similar Projects: Acoustics, Transportation: Highways, Transportation