The Inter County Connector, known locally as the ICC or Route 200, is an 18.8-mile, six-lane toll highway that runs east-west across Montgomery County, connecting Gaithersburg to Laurel in Prince George’s County. For commuters, it’s the one real exception to Montgomery County’s reputation for brutal drive times. Instead of fighting local roads or looping around the Capital Beltway, the ICC lets you cross the county in a fraction of the time. I’m Kevin Grolig, a Compass real estate agent based in Potomac, and as a lifelong Montgomery County native, I drive this road constantly. In this post, I’ll walk through what the ICC is, where it goes, what it costs, and why it matters if you’re buying or selling a home anywhere near its corridor.
What Is the Inter County Connector (ICC)?
The ICC is Maryland’s newest major highway, an 18.8-mile, six-lane toll road built specifically to move traffic efficiently between Montgomery County and Prince George’s County. It runs from Gaithersburg in the west to Laurel in the east, cutting straight across the middle of Montgomery County rather than forcing drivers south toward the Beltway. It’s operated as a toll facility through the Maryland Transportation Authority, and it was designed from the start to relieve pressure on older east-west routes that simply weren’t built for the traffic Montgomery County sees today.
Where Does the ICC Go, and What Are the Exits?
The ICC has eight interchanges along its 18.8-mile stretch, six of them inside Montgomery County and two in Prince George’s County. On the Montgomery County side, the road threads through Gaithersburg, Aspen Hill, Colesville, and Fairland before crossing into Prince George’s County near Calverton and continuing to Laurel. There’s also a dedicated four-lane metro access road connecting the ICC directly to the Shady Grove Metro station, which is a nice bonus if you’re combining a drive with a transit commute into DC.
Why Did the ICC Take Nearly 60 Years to Build?
The ICC was first approved back in 1950, but it sat stalled for decades because of fierce opposition. Environmental groups and community advocates fought the project hard, arguing it would damage wetlands and forest land, disrupt neighborhoods, and add to air pollution, carbon emissions, and suburban sprawl. Supporters countered that it would ease congestion on other roads, boost economic development, and improve access to BWI airport. The project was essentially dead through the 1980s and 1990s until Governor Robert Ehrlich revived it in 2002 as a campaign promise. Groundbreaking happened in 2006, construction started November 13, 2007, and the final segment to US Route 1 in Laurel opened November 7, 2014.
How Much Time Does the ICC Actually Save Commuters?
The ICC can save commuters 20 to 30 minutes compared to routing around the Capital Beltway, especially if you’re headed north toward Baltimore, Philadelphia, New York, or New Jersey. I live in Gaithersburg, and thanks to the ICC I can reach almost anywhere on the eastern side of Montgomery County in 10 to 20 minutes, trips that used to take 30 to 40 minutes before the road existed. I’ve been driving on it since it opened, and I’ve genuinely never hit a traffic jam. Traffic moves at a steady, even pace almost every time I’m on it.
How Do Tolls Work on the ICC?
Why Does the ICC Matter for Montgomery County Home Values?
Easy access to the ICC has become a real selling point for homes throughout central and eastern Montgomery County. Buyers relocating for work in the DC-Baltimore corridor care a lot about commute time, and neighborhoods near ICC interchanges in areas likeGaithersburgandGermantownconsistently benefit from that convenience. If you’re weighing a move to Montgomery County, I’ve put together more on the bigger picture in myMontgomery County relocation guide.
FAQ
Is the ICC the same as Route 200?
Yes. The Inter County Connector is officially designated Route 200, and locals use both names interchangeably.
Do I need E-ZPass to drive the ICC?
No, but it’s cheaper and easier if you have one. The ICC uses all-electronic tolling, so you can also get billed by license plate if you don’t have a transponder, typically at a higher rate.
How long does it take to drive the full ICC?
At the 60 mph speed limit with light, steady traffic, you can drive the full 18.8-mile stretch in roughly 20 minutes end to end.
Which Montgomery County neighborhoods benefit most from the ICC?
Gaithersburg, Aspen Hill, Colesville, and Fairland all sit directly on the corridor and see the biggest commute-time benefit, though Germantown residents also use it regularly to cut across the county.
Does the ICC connect to Metro?
Yes. There’s a dedicated four-lane metro access road linking the ICC directly to the Shady Grove Metro station.
Final Thoughts
The ICC is one of those infrastructure projects that took forever to build but delivered exactly what it promised once it opened. If you’re relocating to Montgomery County and commute time is high on your priority list, it’s worth factoring into where you buy. I talk through this kind of local knowledge with clients every week, so if you have questions about the ICC, a specific neighborhood, or anything else real estate related, reach out through mycontact page.
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