Date:  December 18, 2014
From: Metro News Release

Metro begins testing of real-time bus arrival signs

Metro is in the process of installing real-time customer information displays at four bus stops in preparation for a wider rollout next year.

The signs show bus riders how many minutes before their bus arrives, using GPS technology, and also have the capability to show emergency messages, detour information and travel tips

For details, please see the news release: http://www.wmata.com/about_metro/news/PressReleaseDetail.cfm?ReleaseID=5829