The Maryland Transit Administration endorsed its planned District suburb light rail, the Purple Line, at an open house at the University of Maryland earlier this week.

While some are questioning whether or not the Purple Line is worth it, and if it would really cut down on travel times, others are confident it will make College Park a more attractive place to live and learn. (See video for more.)

The Purple Line is set to cut through the city with a stop at the existing College Park-University of Maryland metro and three stops on campus.

The project was just approved by the Federal Transit Administration to move on to the preliminary engineering phase, during which design plans will become more detailed and complete. The new stage also qualifies the project for federal funds. Highway repair funds or a Maryland gas tax hike could help subsidize the line, the Capital News Service reported.

Construction cost for the Purple Line is estimated at $1.93 billion.

But, the cost of the Purple Line is going up, particularly for Montgomery County, The Washington Post reported. It's because the Capital Crescent Trail and possibly a tunnel in Bethesda must be rebuilt. Montgomery County would be responsible for the cost of rebuilding the trail, but county officials said they would seek some money from the state, according to The Post.