Maryland’s Intercounty Connector significantly improves mobility, safety and the movement of goods and people.



  • Maryland, USA


  • Roads and Bridges
  • Transportation and Infrastructure
  • (View all)


  • Maryland State Highway Administration

Project Status

  • Completed

Linking Regions

Designated as a top transportation priority by the state of Maryland, the 18-mile Intercounty Connector (ICC) is an east-west tolled highway north of Washington, D.C.

The ICC links existing and proposed development areas between the I-270/I-370 and I-95/U.S. 1 corridors within central and eastern Montgomery County and northwestern Prince George's County with a state-of-the-art, multimodal east-west highway.

The new roadway increases community mobility and safety; facilitates the movement of goods and people to and from economic centers; provides cost-effective transportation infrastructure; helps restore the natural, human and cultural environments from past development impacts in the project area; and provides additional mobility.

The first segment of the ICC from I-370 at Shady Grove to MD 97/Georgia Avenue in Rockville/Olney opened February 23, 2011. The roadway from Georgia Avenue to I-95 (Exit 31) at Laurel opened November 22, 2011. The roadway opened to US 1 on November 9, 2014.

Key Numbers

Environmental Commitments

GEC Services

WSP USA, in joint venture, provided general engineering consulting (GEC) services to the Maryland State Highway Administration. The work involved planning support until a Record of Decision was signed; development of plans and specifications up to 30 percent completion; advertising the entire corridor as a design-build contract; and construction management and construction engineering and inspection services during the construction phase.

Symbolizing the client’s commitment to the environment were 63 environmental stewardship projects that addressed environmental stresses caused by past development in the area.