8:45 A.M. Update:

The accident on the inbound 14th Street Bridge is still blocking the far right lane; traffic is getting by in the three left lanes. There are still very heavy delays for I-395 North in Virginia approaching this area.

Traffic signals are reportedly flashing at 9th and S streets in Northwest Washington, joining several other signals reportedly flashing in the District.

Watch out for a disabled vehicle at New Jersey Avenue and S Street in Northwest Washington.

An accident in the 1000 block of Rhode Island Avenue NE could cause problems there.

There’s an accident at 48th Place and Lee Street in Northeast Washington.

8:20A.M. Update:

The accident on the inbound 14th Street Bridge is still snarling traffic heading into D.C. This is causing very heavy backups for commuters heading north on I-395, so expect delays all along that route.

A disabled vehicle on I-395 South at King Street is blocking the right lane and right shoulder.

A disabled vehicle on New York and South Dakota avenues in Northeast Washington could cause problems there.

There’s an accident on South Capitol and Atlantic streets in Southeast Washington and another in the 1900 block of Massachusetts Avenue SE.

An accident on 17th and U streets could also cause problems in Northwest Washington.

7:55 A.M. Update:

The accident is on the inbound 14th Street Bridge. The middle lane is blocked, and traffic appears to be inching by as it progresses into D.C.

7:45 A.M. Update:

An accident on the 14th Street Bridge is reportedly blocking the middle lane, though the direction is unknown at this time.

Traffic signals are reportedly flashing at the following D.C. intersections:

— Alabama Avenue and Naylor Road SE

— Alabama Avenue and Ainger Place SE

— 14th Street and Florida Avenue NW

— 34th and Garfield streets NW

— Martin Luther King Jr. Avenue, Randle Place and Raleigh Place SE

7:25 A.M. Update:

A disabled vehicle at South Capitol and M streets in Southeast Washington could cause problems around that intersection.

And an accident on I-270 South between Old Georgetown Road and the Beltway could cause issues there.

7:10 A.M. Update:

Expect traffic problems to stem from accidents at 22nd and L streets in Northwest Washington and South Dakota Avenue and Monroe Street in Northeast Washington.

7 A.M. Update:

The on-ramp from 7th Street to the Southeast-Southwest Freeway has reopened.

6:50 A.M. Update:

The accident on Florida Avenue near N. Capitol Street has been cleared in Northeast Washington and all lanes reopened.

6:40 A.M. Update:

An accident on 16th and Fuller streets in Northwest Washington could slow traffic there. There’s also an accident on 1st Street and Riggs Road in Northeast Washington.

Wires are reportedly down in the 3400 block of 13th Street NW, so avoid that area if possible.

Watch out for an accident in the 1800 block of Varnum Street NW.

The accident on I-95 in Lorton is no longer blocking one reversible lane, but there are still considerable backups approaching this spot.

6:20 A.M. Update:

The on-ramp from 7th Street to the Southeast-Southwest Freeway is closed due to standing water right now.

An accident on I-95 in Lorton is blocking one reversible lane and causing backups approaching this spot.

6:10 A.M. Update:

An accident on Florida Avenue at N. Capitol Street is blocking all northbound lanes of N. Capitol Street between Florida Avenue and P Street.

Original Post:

Good morning, commuters! The first rush hour of the shortened work week is going to be a tricky one: For one thing, everybody should be back from vacation and crowding this region’s roads and trains once again. We’re not done with rain in this area, because yesterday’s downpour should continue today with more rain. The area is under a flash flood watch for the beginning of the week. Add some extra time to your commute, because rain invariably causes delays.

Also, make sure to watch out for students and school zones in Northern Virginia. More than 300,000 students head back to school in Arlington, Fairfax and Prince William counties, the last students in the region to begin their school year. If you commute in any of these areas, expect to encounter heavier traffic now that the students, parents and faculty members are back on the road.

We’ll be keeping an eye on the roads and rails this morning, reporting any delays or issues. 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.

So far:

An accident on the outer loop of the Beltway before Connecticut Avenue has been cleared and all lanes are open, but delays still linger approaching that spot.