Travel Characteristics on MD 200 Intercounty Connector (ICC) & Vicinity: A Comparative Analysis of Two Scenarios: "With" and "Without" the Facility in Year 2040

A study was undertaken at the request of the MD SHA to assess long-term impacts of MD 200 Intercounty Connector (ICC) in its immediate vicinity and the Metropolitan Washington Region. The most recent regional travel demand model of the Metropolitan Washington Council of Governments Transportation Planning Board (MWCOG/TPB), the latest land use planning assumptions, mobile emissions estimating model and highway/transit networks from the TPB Constrained Long Range Plan (CLRP) at the time of the request were used in this study. This is the second time that the MWCOG/TPB provides technical assistance to MD SHA for the ICC corridor. Technical information from a previous study was incorporated into the ICC Final Environmental Impact Statement (FEIS), which was approved in January 2006. The goal of this study is to assess the long-term role of ICC (year 2040) in the immediate vicinity and the region (I.e., TPB modeled area) by measuring a broad range of travel characteristics ranging from spatial and temporal congestion mitigation, to how much the roadway network is being utilized, to how many more jobs become accessible by highway and transit travel due to the construction of the ICC, to air quality impacts in the study area and the region. These goals were achieved by comparing travel characteristics from two scenarios: a scenario with the ICC completed by year 2040 (i.e., Build Scenario) and a scenario without ICC Built also year 2040 (i.e., No Build Scenario). The No Build Scenario is hypothetical as the first phase of ICC is already constructed and open to traffic. The remainder is scheduled to open in 2013 or 2014. By testing such a hypothetical scenario the long-term impacts – positive and negative – of ICC could be quantified. In summary, the travel-related indicators assessed in this study converge to the same conclusion: MD 200 Intercounty Connector (ICC) yields substantial benefits in its immediate vicinity (i.e., study area) by reducing spatial and temporal congestion, by providing a connecting corridor between I-270, I-95, and the BWI airport further away, by increasing the number of accessible jobs by highway and transit modes at competitive toll rates, while nominally increasing air quality emissions in the region. The beneficial effects of ICC, however, dissipate with distance from the facility.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Appendices; Figures; Maps; Tables;
  • Pagination: 48p

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Filing Info

  • Accession Number: 01488337
  • Record Type: Publication
  • Created Date: Jul 24 2013 10:41AM