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WASHINGTON (WUSA9) -- Two southbound lanes of I-95 before Route 17 have reopened in Stafford where a passenger bus overturned.

Virginia State Police say the crash involves a commercial passenger bus with 54 people on board. We're told at least four people suffered serious injuries and have been transported to a nearby hospital.

On I-495 north before Route 50, two lanes are blocked due to a jackknifed tractor trailer.

Follow breaking traffic incidents Monday morning here and on Twitter @MonikaOn9.

(11:30 a.m.) In Sterling Rt7 is closed between Countryside Blvd and Rt28..pole and wires down..signals are out in the area @wusa9 #VATraffic

(10:51 a.m.) Accident with tractor trailer on I-495 Outer Loop between Braddock Rd and Springfield Interchange blocks 2 right lanes #vatraffic @wusa9

(10:04 a.m.) Accident on ramp from I-495 Outer Loop to northbound Baltimore Washington Pkwy #mdtraffic @wusa9

(9:49 a.m.) Accident blocks 2 right lanes I-270 NB between I-370 and Clopper Rd @wusa9 #MDtraffic

(9:09 a.m.) Taking a flight on #snowpatricksday? @DCA_Airport runways are still closed, @Dulles_Airport has 3 runways open @wusa9

(7:53 a.m.) MT @VaDOTNOVA I-95/395 HOV lanes will close early at 9am, crews need to clear snow from SB ramps to reverse lanes by 3pm #vatraffic @wusa9

(7:46 a.m.) RT @VaDOTNOVA I-95/395 HOV lanes will close at 9 a.m.--crews need to clear snow from SB ramps to reverse the lanes #vatraffic @wusa9

(7:44 a.m.) I-270 NB at MD-27/Father Hurley Blvd Exit 16..ramp reopened..accident cleared @wusa9 #MDtraffic

(7:43 a.m.) Baltimore-Washington Parkway NB between Powder Mill Rd and MD-197..car slid off the road..traffic gets by to the right @wusa9 #MDtraffic

(7:30 a.m.) UPDATE**I-95 South at Rt17 Stafford..some lanes reopened at 4am scene of overturned passenger bus..still some delays #vatraffic @wusa9 #snow

(7:15 a.m.) UPDATE**I-95 South at Rt17 passenger bus overturned at 4:05am..stuck traffic just filtered thru but all lanes still CLOSED at Rt630! @wusa9

(6:59 a.m.) UPDATE**RT @VaDOTFRED Right lane and right shoulder of I-95 SB have re-opened to traffic before Rt17..passenger bus overturned at 4am @wusa9

(6:57 a.m.) It's still there! Jacknifed Tractor Trailer I-95 South at Lorton..center and right lanes are blocked #vatraffic @wusa9

(6:55 a.m.) #Metro Red Line: Single tracking btwn Dupont Circle & Van Ness with track problem at Dupont Circle..delays in both directions @wusa9 @wmata

(6:48 a.m.) @MDSHA says "Staying off of the roads makes it easier for our crews to do their work plowing and treating roads" @wusa9 #MDtraffic

(6:42 a.m.) @mtamaryland MARC delays:Penn train 505 is 19 minutes late; Penn train 407 is 10 minutes late; Brunswick train 892 is 15 minutes late @wusa9

(6:40 a.m.) @DCDPW says parking restrictions are in effect today..7am-9:30am and 4-6:30am #dctraffic @DDOTDC @wusa9

(6:29 a.m.) I-395 North before Duke Street..accident blocks the left lane @wusa9 #VATraffic

(6:25 a.m.) George Washington Memorial Pkwy SB ramp to Rt123 is closed with accident and slippery conditions @wusa9 #VATraffic

(5:57 a.m.) I-495 Inner Loop ramp to I-95 South in Springfield..be careful on bridges, ramps, overpasses #snowpatricksday @wusa9 #vatraffic

(5:47 a.m.) From @usparkpolicepio: GW Parkway Northbound is CLOSED at Spout Run Pkwy..several cars are stuck..snow plows are with them @wusa9 #vatraffic

(5:44 a.m.) UPDATE from #VAStatePolice: I-95 South before Rt17 CLOSED..bus with 50 passengers overturned at 4:05am..at least 4 serious injuries @wusa9

(5:25 a.m.) MT @mtamaryland MARC- Brunswick Train 870 is operating 18-20 minutes late departing Point of Rocks http://tinyurl.com/marcsvc @wusa9 #MDtraffic

(5:17 a.m.) In Columbia, MD accident on Rt32 EB at Broken Land Pky..blocking 2 left lanes #mdtraffic @wusa9

(5:11 a.m.) #SnowMadness! Jacknifed Tractor Trailer on I-495 North before Rt50 blocks the 2 right lanes #mdtraffic @wusa9

(4:47 a.m.) @MD511Southern: disabled vehicle:I-270 northbound Exit 26 - MD 80/Fingerboard Rd Frederick

(4:43 a.m.) #BREAKING Traffic: Serious accident I-95 South CLOSED before Rt17 in Stafford..passenger bus overturned..detour at Rt630 (exit 140) @wusa9

(4:31 a.m.) UPDATE**@Metrobusinfo: Now on a 'Severe Snow Plan" with limited service..http://bit.ly/1nx09sT @wusa9 #snowpatricksday @wmata

(3:47 a.m.) MARC and VRE trains are on full service..but will reassess at 4am @wusa9 #mdtraffic #vatraffic

(3:47 a.m.) #MetroAccess service is suspended due to the weather today: http://bit.ly/1kWbMHU @wmata @wusa9

Surae Chinn is in Reston where drivers have been working all morning to keep the roads safe.

Metrobus will transition from severe snow plan to moderate snow service plan starting at 11 a.m. Most Metrobus routes will have service with snow detours in effect to keep buses off of hilly terrain, narrow side streets and other problem areas.

Metrorail opened at 5 a.m. Monday, running a normal weekday schedule.

MetroAccess paratransit service is suspended Monday.

VRE is running an "S" Schedule. Only trains marked with an "S" above its train number on the published schedule will operate.

MARC will operate on an S schedule on the Penn, Camden and Brunswick Lines. This means that only trains designated with an S at the top of the column will operate.

TheBus will be operating on limited service, say Prince George's County officials. Passengers should expect delays.

Ride On bus service will run its regular weekday service. Officials say riders should expect some delays and detours. Check http://rideonrealtime.com or call 3-1-1 for more information.

Charles County, Md. officials say VanGO services will start at 10 a.m. on Monday. Significant delays are expected until all roads are cleared.

DASH began service at 8 a.m., according to City of Alexandria officials.

Don't forget to download our iPad app with traffic feature so you can check the conditions on your route before you head out! Get it here: https://itunes.apple.com/us/app/wusa9-news/id434847893?mt=8

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