Metro rolls out its Rush Plus service Monday. This major change to Metro service will alter the number of trains running on some lines, shift destinations of some trains and tweak many commutes.

If you aren’t prepared, you could board your usual train and wind up on a confusing trip.

Here are 10 things you need to know before heading out:

1. This affects only rush-hour service. It’s in effect weekdays between 6:30 and 9 a.m., and between 3:30 and 6 p.m. (Rush-hour fares start earlier and end later.)

2. More Orange and Yellow Line trains will run every hour. This is meant to ease congestion on the trains and at the stations.

3. The Orange Line will still run between Vienna and New Carrollton, but during Rush Plus hours, some Orange Line trains will run between Vienna and Largo Town Center. If you’re heading to any station east of Stadium-Armory, make sure you’re on the right train.

4. The Yellow Line will still run between Huntington and Fort Totten, but during Rush Plus hours, some trains will run between Franconia-Springfield and Greenbelt. If you’re heading north of Fort Totten or south of King Street, make sure you’re on the right train.

5. Metro is eliminating three Blue Line trains per hour, creating extra room in the Rosslyn tunnel under the Potomac. Blue Line riders might want to board the Yellow or Orange lines instead to determine whether riding another line and transferring makes up for the Blue Line changes.

6. Metro is adding three Orange Line trains per hour to ease the infamous “Orange Crush.”

7. Metro is also adding three Yellow Line trains per hour to ease crowding between the Pentagon and L’Enfant Plaza.

8. The Green and Red lines are not affected.

9. Go to for a tool that will help you see how your specific commute will be affected. The tool works on smartphones, tablets and other electronic devices.

10. You can also watch a short video explaining the changes at or read our user’s guide at

Visit on Monday morning for the latest updates from around the Metro system.