We’ve created a mobile tool to help you see how Rush Plus could alter your commute. Use it at wapo.st/rushplusmobile.

8:40 A.M. Update:

Friday is the third anniversary of the deadly Red Line crash that claimed the lives of nine people and injured dozens more. Politicians and Metro officials will join with family members to dedicate a memorial plaque near the site of the accident.

The ceremony is scheduled for 11 a.m. Here’s what you need to know about street closures and parking:

— The New Hampshire Avenue/Charles Langley Bridge will close to drivers between 10 a.m. and 1 p.m. (It will remain open to pedestrians and bicycle riders.)

— Parking on the curb in the 5700 block of 1st Street NE will be restricted between 8 a.m. and 2 p.m.

— Traffic coming into the District via New Hampshire Avenue will be detoured right on Peabody Street NE, right on Chillum Place NE, left on Kansas Avenue NE, left on Blair Road NE, left on Madison Street NE before turning right back onto New hampshire Avenue NE. (Outbound traffic will do the same detour, but with all directions reversed.)

Read more about Metro’s efforts to improve safety and remaining problems in this story by Katherine Shaver and Lori Aratani.

8:10 A.M. Update:

The disabled vehicle on the outer loop at Braddock Road has been cleared.

7:40 A.M. Update:

There don’t appear to be any lingering MARC delays due to this morning’s earlier issues, but we’ll update you if any other problems arise.

7:20 A.M. Update:

A disabled vehicle on the outer loop of the Beltway at Braddock Road is blocking the right shoulder.

7 A.M. Update:

The debris on I-270 South before Old Hundred Road has been cleared.

6:40 A.M. Update:

Some debris on I-270 South before Old Hundred Road could cause delays there. No lane closures have been reported yet.

6:20 A.M. Update:

Another MARC issue: Train 890 is running 8 to 10 minutes late.

6:10 A.M. Update:

MARC Brunswick Line train 872 is running 15 to 20 minutes late now behind delayed train 870. Again, Metro will take MARC tickets.

Original Post:

Good morning, commuters! We’ll be keeping an eye on the roads and rails this morning, reporting any delays or issues — and we will need your help. If you hear about any congestion, delays, problems or anything at all, tell us in the comments section below or by tweeting @drgridlock.

The heat wave hangs around for another day, and even though Friday isn’t as brutally hot as Wednesday and Thursday, it’s still muggy out there, according to the Capital Weather Gang. There could also be some morning showers or thunder and ore thunderstorms later in the day.

Issues so far:

— MARC Brunswick Line train 870 left Brunswick 40 minutes behind schedule due to mechanical problems. It is running behind train 890. Metro will honor MARC tickets.

— An accident on I-95 North in Woodbridge is blocking the left shoulder and left lane.

Click here to receive e-mail alerts for major traffic and transit issues.