Credit: Metro says that beginning Friday at 10 p.m. and continuing through Sunday, Orange, Silver and Blue line trains will operate every 24 minutes.

Metro: Maintenance work to affect 4 of 6 lines this weekend

Metro track inspectors copied old reports at site of derailment

NTSB releases cause of July Metro train derailment

Md. first responders plead with drivers to move over

Metro committee advances plan to shorten service day

3 crashes snarl area roads during Thursday-morning commute