The Benning Road–H Street Limited Line, designated Route X9, is a limited stop MetroExtra bus route operated by the Washington Metropolitan Area Transit Authority between Capitol Heights station, which is served by the Blue and Silver lines of the Washington Metro, and Gallery Place station, which is served by the Red, Green and Yellow lines of the Washington Metro.

During weekday midday, Route X9 is shortened to operate to Minnesota Avenue station, which is served by the Orange line of the Washington Metro, which takes 30 minutes.

The route would only serve all local stops and would detour along Eastern Avenue if there are moderate snow conditions.

[2] Route X9 originally operated between Capitol Heights station and Federal Triangle but was discontinued in the late 1980s and replaced by the Benning Road Line.

This proposal was also recommended in the 2010 Benning Road-H Street Lines Service Evaluation Study.

[15] On December 11, 2022, all westbound X9 trips was shortened to terminate at Gallery Place station.