Credit: A water main broke south of Dupont Circle on Thursday in D.C.

Water main breaks disrupt traffic in DC, Md.

Metro set to increase service, decrease some rail fares

Study: Hundreds in Maryland die prematurely from vehicle emissions

As I-495/I-270 widening clears hurdle, Montgomery Co. leaders slam project

Crash snarls Bay Bridge traffic

Arlington Co. will consider lowering speed limits on some busy streets