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Midcounty Corridor
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Midcounty Corridor Study


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  1. March 2015 Draft Preferred Alternative/Conceptual Mitigation Report (PA/CM)
  2. MCDOT February 4, 2014 Responses to Comments from USACE/MDE/EPA/the City of Gaithersburg
  3. MDE December 12, 2013 Information Request Letter
  4. Planning Board November 25, 2013 Recommendation Letter
  5. USACE November 19, 2013 Information Request Letter
  6. EPA August 20, 2013 Comment Letter
  7. Transcript for August 7, 2013 USACE/MDE Joint Public Hearing
  8. Public Notice for August 7, 2013 USACE/MDE Joint Public Hearing
  9. The City of Gaithersburg July 17, 2013 Comment Letter
  10. May 2013 Draft Environmental Effects Report (EER)
  11. June 2012 Midcounty Corridor Study Video
  12. June 2012 Midcounty Corridor Study Traffic Report
  13. November 2010 Alternative Retained for Detailed Study (ARDS) Map
  14. November 2010 Modified ARDS Recommendations
  15. June 2010 ARDS Recommendations
  16. January 2007 Purpose and Need
  17. Contact Us/Comments


Public Involvement

Frequently Asked Questions
Contact Us/Comments

Frequently Asked Questions

How long has the Midcounty Highway been a part of the Master Plan?

Since the 1960s.

Why was the project held up since 2004? What is different about the project between now and 2004?

In 2004, the Montgomery County Department of Transportation (MCDOT) began a planning study as the first step toward evaluating the need and feasibility for the remainder of the Midcounty Highway master plan alignment. As part of the planning process, the County determined the purpose and need for the extension of Midcounty Highway and examined the environmental features in the master plan alignment corridor.  These findings and the proposed purpose and need were presented at a public workshop in November 2004.

Following the public workshop, concerns were raised by state and federal environmental resource agencies that the purpose and need for the Midcounty Highway extension should be further defined.  The agencies also requested other alternatives be evaluated in addition to the master plan alignment.

Accordingly, the MCDOT has invested additional resources to provide greater analysis, and the result of the new direction is the broader Midcounty Corridor Study (MCS). The Midcounty Corridor Study expands the scope to a larger region and evaluates more alternatives with different alignments.

What is the new study area for the Midcounty Corridor Study?

The western boundary for study area for the Midcounty Corridor Study (MCS) is I-270 between Washington Grove and Clarksburg.  The eastern boundary includes Muncaster Mill Road, Snouffer School Road, and Wightman Road.

Who is conducting the study?

Montgomery County Department of Transportation (MCDOT) is the lead agency responsible for the study.  Because of the probable environmental permits required for construction of any of the alternatives, the US Army Corps of Engineers is the lead federal agency responsible for the environmental analysis.  If a project is eventually constructed, MCDOT would be responsible for the construction and eventual maintenance of the facility.

What is the purpose for the study

The purposes for transportation improvements as evaluated in the Midcounty Corridor Study area are:

  • To relieve existing and projected congestion on roadway facilities between Clarksburg and Gaithersburg, east of I-270; 
  • to provide a north-south corridor which improves the safety and efficiency of short and moderate length trips in the study area;
  • to improve vehicular, pedestrian and bicycle access to residential, commercial and employment destinations in Clarksburg and in the eastern areas of Gaithersburg and Germantown; and
  • to develop all improvements in an environmentally sensitive manner using measures to avoid, minimize, and mitigate impacts.

Where are we now in the Midcounty Corridor Study?  What are the next steps in the planning process?

The project's purpose and need has been defined, and a conclusion has been reached on the Alternatives Retained for Detailed Study (ARDS). The detailed study of the ARDS has culminated in the publication of the May 2013 Draft Environmental Effect Report (Draft EER). A U.S. Army Corps of Engineers/MD Department of the Environment (USACE/MDE) Joint Public Hearing was conducted on August 7, 2013. The Preferred Alternative and Conceptual Mitigation (PACM) document is anticipated to be submitted to the state and federal environmental regulatory agencies for concurrence in Summer 2014.

For more information about the study process, please visit the
Project Schedule and Process link on this website.    

How can the public provide input to the study?  How do I make a comment or ask a question?

The public may provide input and comments on the Midcounty Corridor Study (MCS) at anytime during the life of the project. Comments can be made by mail, phone, email, or via this website Click on Contact Us/Comment Form.   

How do I keep informed?

  1. Add your name and address to the project mailing list and e-mail distribution list Click on Contact Us/Comment Form.
  2. Contact the project manager anytime:

    Greg Hwang, Project Manager
    Midcounty Corridor Study
    Montgomery County Department of Transportation
    Division of Transportation Engineering
    100 Edison Park Drive, 4th Floor
    Gaithersburg, MD  20878
    Phone:  240-777-7279
  3. When decisions have been reached, there will be project mailings.  Everyone on the project mailing list will receive project mailings.

What about transit?

All alternatives evaluated, including the No Build Alternative, assume that all transit improvements which are part of the region’s long range plan will be implemented by 2030, the horizon year for this study.  This includes the Corridor Cities Transitway and numerous improvements to local, express, and feeder buses.  Beyond that, the Midcounty Corridor Study explored increased transit service (more frequent service, with faster travel times) in the development of Alternative 2, Transportation System Management/Travel Demand Management Alternative

What about pedestrian/bicycle accommodations?

Bicycle and pedestrian improvements are included as one of the study’s purposes.  Off-street bicycle paths and additional sidewalks where none presently exist will be investigated. 

What kind of environmental document will be completed?

Because the environmental analysis is required to follow the federal
National Environmental Policy Act (NEPA), either an environmental assessment (EA) or an environmental impact statement (EIS) will be prepared. 

Which resource and regulatory agencies are participating in the study?

Please click on Project Team

How and when will the final alternative be selected?

The Draft Environmental Document will evaluate the alternatives retained for detailed study (ARDS).  Following the Draft Environmental Document’s circulation, a comment period and a public hearing will be held.  Based on the analysis included in the Draft Environmental Document and comments received on it, a recommendation will be made to the Montgomery County Executive and County Council on the Preferred Alternative.  Likewise, a recommendation will be made to the concurring resource agencies.  Any of these agencies/offices may recommend revisions. 

MCDOT will make every effort to obtain concurrence from state and federal environmental regulatory agencies on the Preferred Alternative and Conceptual Mitigation (PACM) in Fall 2014.

Will my property/neighborhood be impacted by the project?  What will the environmental impacts be?  What will the project cost?

Property impacts, environmental impacts and costs by each alternative of the ARDS are summarized in the May 2013 Draft Environmental Effect Report (Draft EER).

How are public comments used in determining the project path forward?  Will my comments make a difference?

Public comments will be documented and become part of public records and allow public officials, transportation decision-makers and Study Team to better understand the needs of the community and the unique concerns each citizen may have.  Public input allows developing a transportation solution which is responsive to the public’s needs and desires for the project.  The project, at this time, has not selected a preferred alternative.  During the Midcounty Corridor Study process, MCDOT will perform an in-depth analysis of several alternatives and document each alternative’s impact to natural, cultural, and community resources and its ability to meet transportation objectives.   By the conclusion of the Midcounty Corridor Study, a preferred alternative will be recommended by MCDOT to the elected officials and decision makers.

If a build alternative is selected, when will construction begin?  How long will the construction take?  When will it be open for public use?

The Midcounty Corridor Study is not funded for construction. At the conclusion of the Midcounty Corridor Study, the Director of MCDOT and elected officials will determine whether or not the Midcounty Corridor Study should advance and to receive funding for final design and construction.


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