Wisconsin Avenue Line

31, 33
Wisconsin Avenue Line
Route 33 in Friendship Heights
Overview
System	Metrobus
Operator	Washington Metropolitan Area Transit Authority
Garage	Western
Livery	Local
Status	In Service
Began service	31: June 29, 2008 33: August 24, 2014
Route
Locale	Montgomery County, Maryland, Northwest, Southwest
Communities served	Bethesda, Friendship Heights, McLean Gardens, Georgetown, Tenleytown, Foggy Bottom (31), Potomac Park (31) Federal Triangle (33)
Landmarks served	Friendship Heights station, Tenleytown–AU station, Washington National Cathedral, Georgetown, Foggy Bottom-GWU station (31), Potomac Park (31), McPherson Square station (33), Federal Triangle (33), L'Enfant Plaza station (33) (Late nights and early mornings only)
Start	Friendship Heights station
Via	Wisconsin Ave, 23rd Street NW (31), H Street NW (33 to Federal Triangle), I Street NW (33 to Friendship Heights), Pennsylvania Avenue NW
End	31 Potomac Park 33: Federal Triangle (L'Enfant Plaza station) (Late night & early morning only)
Other routes	32, 36
Service
Level	Daily
Frequency	10 - 12 Minutes (7AM - 9PM) 20 minutes (after 9PM) (33 only)
Operates	31: 6:00 AM - 9:10 PM (Weekdays only) 33: 24 Hours
Ridership	541,183 (31, FY 2023)[1] 2,153,526 (33, FY 2023)[1]
Transfers	SmarTrip only
Timetable	Wisconsin Avenue Line
Route map ← 29N  {{{system_nav}}}  32 →

The Wisconsin Avenue Line, designated as Routes 31 or 33, is a daily bus route operated by the Washington Metropolitan Area Transit Authority. Its main purpose is to provide service to the upper Northwest side via Wisconsin Avenue NW.

Routes 31 and 33 operate between the Friendship Heights station of the Red Line of the Washington Metro and Potomac Park (31) or Federal Triangle (33), running every 10 to 12 minutes between 7 a.m. and 9 p.m. on weekdays. In addition, Route 33 operates on weekends every 10 minutes during the day and 15 - 20 minutes after 9 p.m. daily; its late-night and early-morning trips extending to L'Enfant Plaza station of the Blue, Orange, Silver, Green and Yellow Lines of the Washington Metro. Route 31 trips are roughly 45 minutes long, while Route 33 trips are 55 minutes long.

The routes operate out of WMATA's Western division, which uses New Flyer D40LFR, DE40LFA, and XDE40 buses.