Questions remain on Purple Line proposal

The plan for the proposed Purple Line took a key step forward this week when Maryland Gov. Martin O’Malley said he will seek federal money this fall for the line as a light rail system.

But there are still many details to be worked out before the opening of the 16-mile transit line including who will pay to run it, the exact location of stops, and which transit agency will operate the trains. The Purple Line, which has been in the works for some 20 years, would open in 2016 at the earliest.