The 14.5-mile (23.3 km) trip between Gaithersburg and Bethesda typically takes 20–30 minutes off-peak.
I-270 South is the direct corridor; MD-355 (Rockville Pike) serves as an alternative with more signals. Real-time apps (Waze, Google Maps) help navigate incidents.
Metro’s Red Line (Shady Grove to Bethesda) runs parallel; park-and-ride at Shady Grove or Grosvenor avoids parking hassles in Bethesda.