• Specialty:

    Air Quality
    Noise / Vibration
  • Location:

    Transportation
  • Type:

    Environmental Study
    Permitting / Compliance
  • Timespan:

    2003-2005
  • Location:

    Waltham, MA

Project Number:

2211

Route 128/Route 20 Interchange

SERVICE:

Air Quality & Noise Impact Analyses

DESCRIPTION:

A highway project sought changes to the interchange of Route 128/I-95 and Route 20 in Waltham, Massachusetts. Tech Environmental performed air quality and noise impact analyses to evaluate the proposed changes.  A mesoscale analysis of VOC and NOx emissions was performed that showed lower emissions in the future with the improvements, even with the addition of traffic from a proposed office project.  The FHWA Transportation Noise Model (TNM) was used to show that traffic noise levels on a residential street will decrease as a result of the project.

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Key Points

  • A highway improvement project faced air quality and noise concerns, and was further complicated by a proposed office project nearby.
  • Tech Environmental performed air quality and noise impact analyses and confirmed that impacts would be within applicable standards.