Traffic & Transportation in Gaithersburg

Gaithersburg's transportation picture combines MARC commuter rail access with a genuinely car-dependent suburban core outside the walkable Downtown Crown/Kentlands districts.

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MARC commuter rail into Union Station

The MARC Brunswick Line serves Gaithersburg, offering a real, practical commuter-rail connection into Washington, DC's Union Station.

Practical airport access

Washington Dulles International and Ronald Reagan Washington National are both a real, practical drive from Gaithersburg, roughly 30-45 minutes depending on traffic and route.

Genuinely car-dependent outside the walkable core

Beyond Downtown Crown, RIO Lakefront, and Kentlands, Gaithersburg remains genuinely car-dependent, consistent with much of suburban Montgomery County.

Key takeaways

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Last reviewed: 2026-08-27. Independent research; not financial, tax, or legal advice -- confirm current figures with a local professional before making a decision.