If your rush hour commute on Metro seemed different than usual, that’s because it probably was.

Today is the first day of Metro’s new Rush Plus rush hour service, a new arrangement that’s meant to offer passengers on the Orange and Yellow lines more options than before. During peak travel times—6:30 a.m. to 9 a.m. and 3:30 and 6 p.m—three trains in each direction will be added to both lines, a change that could benefit 110,000 daily commuters.

So, if you get on Metro at the Vienna station, Rush Plus will see more trains available to you. But you’ll still have to watch for the final destination. Some of the additional Orange Line trains will be ending at Largo Town Center—a Blue Line station—instead of New Carollton. The same goes for the Yellow Line: you’ll be able to jump on a Yellow Line train at at Greenbelt that ends its run in Franconia-Springfield instead of Huntington. (The means that riders coming from north of the Fort Totten stations and looking to get to DCA will be able to use a Yellow Line train for the whole trip.)

Of course, Metro isn’t adding trains so much as it is changing the routes of the ones it already has in circulation, so more trains running on the Yellow Line means fewer servicing Blue Line stations. (Metro isn’t hiding this fact, saying on its website that “some customers may wait up to six additional minutes for a Blue Line train.”) Metro officials say the changes are based on the busiest lines and most popular commuting routes, as well as part of the preparations for the opening of the Silver Line next year.

If this is all confusing to you, watch the video below for some guidance. And if you had any experience with Rush Plus today—good or bad—leave them in the comments.