Newton, Mass., replaced a street’s red, white and green centerline with standard yellow stripes, citing traffic safety ...

In December, the Red Line was the first to start using automation again. Now, the Green and Yellow lines will be the next phase of implementation in a plan to bring ATO back to all train lines.

Metro planned to bring faster, smoother automated trains to the system’s Green Line this weekend. But the agency is being blocked by its safety watchdog, which said the rail system cannot expand ...