8:40 A.M. Update:

An accident on I-95 before Sandy Spring Road is blocking one northbound lane and both shoulders.

There’s a disabled vehicle on Pennsylvania and Alabama avenues in Southeast Washington, so expect delays.

An accident on Reno Road and Nebraska Avenue in Northwest Washington could cause issues there.

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

— 6th Street and Florida Avenue NE

— 34th Street and Wisconsin Avenue NW

— Alabama Avenue, Suitland Parkway and 36th Street SE

8:25 A.M. Update:

All lanes have reopened on Old Georgetown Road at at Beech Drive in Bethesda.

The disabled vehicle has been cleared from the right lane on the outer loop between the Leesburg Pike and Dulles Toll Road.

After the jump, information on reporting power outages, downed trees and debris in roadways.

8:10 A.M. Update:

Some debris on I-95 North after Powder Mill Road could slow traffic there.

8 A.M. Update:

The accident on the inner loop between Rockville Pike and Connecticut Avenue has been cleared.

7:55 A.M. Update:

The disabled vehicle blocking the right lane on the outer loop is between the Leesburg Pike and Dulles Toll Road.

7:50 A.M. Update:

There’s an accident on the inner loop of the Beltway between Rockville Pike and Connecticut Avenue. Expect inner loop delays.

A disabled vehicle on the outer loop of the Beltway at Leesburg Pike is blocking the right lane.

We’re hearing reports of backups on the eastbound Dulles Toll Road. As always, if that’s your route, add extra time to your commute.

We’ve also heard from a commuter that Woodyard Road is blocked in both directions by utility work near Dower House Road in Rosaryville.

7:25 A.M. Update:

Southbound Old Georgetown Road is entirely blocked at Beech Avenue by an accident.

7:10 A.M. Update:

An accident on Old Georgetown Road at Beech Drive in Bethesda could cause traffic problems just south of the Capital Beltway.

6:50 A.M. Update:

Delays are already cropping up on eastbound I-66 at the Beltway and on a few other spots on that roadway farther west of the Beltway.

Original Post:

The biggest problem for commuters heading into the Tuesday morning rush hour remains power outages and debris. With hundreds of thousands of power outages still impacting the region, travelers can expect to encounter dark traffic signals as they head to work. Fallen debris can block roadways and cause massive delays.

First, as always:When you come to an intersection and the traffic signals aren’t working, treat this as a four-way stop.

You should also expect to hit added delays and congestion you wouldn’t always hit heading to work. Add some time to your commute to allow for delays and for potentially taking detours.

We’ll be monitoring the morning commute and reporting anything we hear. If you see traffic problems, blocked roadways, dark traffic signals or any other problems, let us know in the comments section below or by tweeting @DrGridlock.

Here are some resources for reporting power outages, downed trees and debris in roadways.

-- BGE outages: 877-778-2222; downed wires: 800-685-0123; outage map
-- Dominion outages and downed wires: 866-366-4357; outage map 
-- Northern Virginia Electric Cooperative outages and downed wires: 703-335-0500; outage reports
-- Pepco outages: 877-737-2662; downed wires: 202-872-343; outage map
-- Washington Gas: 800-752-7520

Downed trees and debris in roads

Anne Arundel County: After hours, 410-222-6120; northern district, 410-222-6120; central district, 410-222-7940; southern district; 410-222-7940; Annapolis; 410-263-7870.

Arlington County:703-228-6527; after hours, 703-558-2222.

Calvert County: 410-535-1600.

Charles County: 301-932-3450 or 301-870-2778.

The District: 311; clogged storm drains, 202-612-3400.

Fairfax County703-324-5033 (Public Works); 571-350-1000 (Emergency Management); 703-383-VDOT.

Howard County: 410-313-3440.

Loudoun County:703-777-0333 (Emergency Management); 703-383-VDOT.

Maryland state: 800-543-2515.

Montgomery County: 240-777-6000.

National Park Service: http://www.nps.gov/state/dc/

Prince George's County: 301-499-8520; after hours, 301-499-8600.

Prince William County: 703-792-7070 or 703-383-VDOT.

Virginia State703-383-VDOT.