Legal challenges have once again played havoc with the construction schedule for Maryland’s Purple Line, raising the possibility that the 16-mile light rail system may miss its planned 2022 start-up date according to state transportation officials.

Learning lessons from the much-delayed, 23-kilometer first phase of a Tel Aviv regional light-rail system, Israeli transportation officials have issued new engineering and project management tenders for the next two lines, with construction investment estimated at $8 million.

Two priority rail station projects are moving forward in Providence and Pawtucket/Central Falls, R.I., both with “built-in ridership in densely populated areas,” says the Rhode Island Dept. of Transportation spokesman Charles St. Martin.

The Massachusetts Bay Transit Authority is hiring a construction manager to administer the long-delayed $2.3 billion Green Line Extension project, according to an MBTA press release.