D.C. Metro Rehab May Challenge Ozone Compliance

A nearly yearlong effort to rehabilitate the Washington, D.C., area’s Metrorail system is expected to increase congestion on the roadways in some parts of the nation’s capital, which could increase vehicle emissions at the same time the area is trying to attain the 2015 ozone standards, according to a local air quality official.

The Washington Metropolitan Area Transit Authority June 4 launched the SafeTrack plan with the goal of completing three years of maintenance and rebuilding work in about 10 months. In addition to expanding maintenance time on weekends through early closures of the entire system, the plan also calls ...