The Bethesda–Silver Spring Line, designated Route J1, J2, is a daily bus route operated by the Washington Metropolitan Area Transit Authority between Silver Spring station of the Red Line of the Washington Metro and Westfield Montgomery Transit Center.

Routes J1 and J2 operate between Silver Spring station and Montgomery Mall connecting passengers along the East-West Highway and Old Georgetown Road corridor.

During the weekday AM peak hours, routes J1 and J2 trips to Montgomery Mall operate along Battery Lane except on holidays.

[5] Due to security concerns following the September 11 Attacks, routes 14B, J1, J2, and J3 were forced to detour near the NIH and Medical Center.

Leaving the station, buses will turn right on South Drive, left on W. Cedar Lane and right on Old Georgetown Road where the current routing will be resumed.

Buses will turn left on W. Cedar Lane, right on Rockville Pike, right on South Drive and continue to Medical Center station.

Leaving the station, buses will continue on South Drive to Rockville Pike, turn right on Woodmont and right on Edgemore where the regular routing will be resumed.

Buses will continue on Jones Bridge Road, turn right on Rockville Pike and left on South Drive to the station.

Buses will turn left on Cedar Lane, right on Rockville Pike, and right on South Drive to Medical Center station.

Buses will leave the station via South Drive, turn right on Rockville Pike and left on Jones Bridge Road where the regular route will be resumed.

Performance measures for the line goes as follows:[12] According to WMATA, the portion of Route J1 exclusive to Jones Mill Road and Jones Bridge Road has 3.54 boardings per revenue trip based on Automatic Passenger Counter data during the August 2016 Schedule Period (August 21-December 18), which does not meet the WMATA standard 10.7 riders per trip.