If you’re a regular reader of Transit on Thursday, you’ll have noted week after week of Green line delays over the past few months caused by the testing of new rail cars.

Good news – those delays could soon cease.

Metro is getting ready to stop testing and starting using, reports WTOP. The new rail cars, featuring two different designs, will be brought into service by Christmas.

The first design is carpetless, with lots of above head metal handles. The second features benches and cloth seats as well as “padding” customers can lean against.

We’re curious to see what this all really looks like. There is no word on where the cars will first appear, but if history repeats itself, the Green line is the likely destination — new cars generally enter the system on the Green line.

Also, please note that we said “soon cease.” Details on this week’s car testing-prompted delays, as well as other Metro news, after the jump.

Photo by Greg McElhatton