Corridor Cities Transitway Design Services – Phase 1,
Montgomery County, MD

Sabra & Associates, Inc. (SAI) is responsible for the design of two new bridges, the design of every retaining wall and every culvert extension along the proposed Phase 1 of the Corridor Cities Transitway (CCT) Bus Rapid Transit (BRT) alignment. Phase 1 of the CCT will travel along the I-270 corridor connecting the Shady Grove Metrorail Station in Rockville to the MARC Metropolitan Grove Station with the planned future Phase 2 continuing on to COMSAT, just south of Clarksburg, MD in Montgomery County.


  • Structural Design
  • Highway Design
  • Traffic Design

CCT Bridge over I-270

SAI is designing the foundations, substructure and superstructure of a new 10-span CCT bridge. This proposed bridge will carry the CCT over Shady Grove and then continue over I-270. The bridge will include a hiker/biker trail as well as the CCT buSAIy lanes.


Muddy Branch Bridge

SAI is designing the foundations, substructure and superstructure of a new 3-span CCT bridge.  This proposed bridge will carry the CCT over the Muddy Branch along the southern edge of the existing Great Seneca Highway Bridge over the Muddy Branch and be designed to blend in with the existing structure. The existing bridge that carries Great Seneca Highway over Muddy Branch was constructed in the late 1980s by Montgomery County.


Retaining Walls

SAI is designing 26 new CCT retaining walls. The CCT alignment will utilize many retaining wall types in order to minimize impacts to adjacent properties in a combination of cut and fill conditions.


Drainage Structures Extensions

SAI is designing five culvert extensions under the proposed CCT alignment. These extensions are being designed for existing small structures of various materials including corrugated metal, concrete box and precast arch.

Columbia Maryland

7055 Samuel Morse Drive
Suite 100
Columbia, MD 21046
Phone: 443-741-3500
Fax: 443-741-3700

Baltimore Maryland
300 East Lombard Street
Suite 840
Baltimore, MD 21202

Phone: 4443-741-3500
Fax: 443-741-3700

Baltimore Maryland
1502 Joh Avenue
Suite 100
Baltimore, MD 21227

Phone: 410-536-3653
Fax: 410-536-3654

Washington, D.C.

100 M Street SE
Suite 550
Washington, DC 20003

Phone: 202-570-7080
Fax: 202-697-5007

Vienna, Virginia

8150 Leesburg Pike
Suite 630
Vienna, VA 22182

Phone: 703-942-8990


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