Red Line trains are still single tracking between the Grosvenor-Strathmore and Medical Center stations in Bethesda because of a track problem outside the Grosvenor station.

The single tracking has Metro advising riders to consider using the J2, J3 or J5 bus routes to avoid delays:

Red Line passengers may consider Metrobus J2 & J3 w/stops at Medical Center & Bethesda or J5 with stops at Grosvenor & Silver Spring. #wmata

— Metrorail Info (@Metrorailinfo) October 27, 2014

Outbound Red Line trains to Shady Grove are bypassing Medical Center and Grosvenor altogether in an attempt to reduce delays during the morning commute.

Metro first reported the problem just before 8:30 a.m.

One report said the track problem is a cracked rail:

-TRAFFIC ALERT- @wmata has a cracked rail, #Grosvenor #redline. Single tracking, expect delays

— Charlie Bragale (@charlienbc) October 27, 2014