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WASHINGTON (WUSA9) -- Wednesday morning, drivers on I-270 are experiencing major traffic delays for the third time this week. A huge pothole has led to flat tires and lanes are blocked, resulting in a traffic jam.

Maryland State Police say they do not know what caused the hole in lane one of the Route 85 overpass on southbound I-270. That lane is currently closed.

Police tell us the State Highway Administration will attempt to make repairs. They are unsure how long the lane will be closed.

In Virginia, an accident involving a pedestrian closed Claiborne Parkway at Waxpool Road in Ashburn. Authorities say the pedestrian died from her injuries. Police are investigating.

Our traffic anchor Monika Samtani is keeping track of big traffic incidents. You can follow her on Twitter @MonikaOn9.

Here are her latest tweets:

6:10 a.m. -- In Brandywine..Accident on Branch Av Northbound before Burch Hill Rd..slow from Rt301 #mdtraffic @wusa9

5:54 a.m. -- I-95 North after Rt610.Aquia Harbor..accident with 3 cars blocks the left lane..slow from Rt630 #vatraffic @wusa9 @VaDOTNOVA

5:50 a.m. -- #PotholeProblems! I-270 South at Rt85..huge pothole..flat tires..2 left lanes are blocked and traffic is jammed from I-70 @wusa9 #mdtraffic

RELATED VIDEO: Insurance will pay for some pothole damage

AAA says a simple wheel alignment will set you back about $50 or you can spend $500 or more replacing a top-of-the-line alloy wheel.

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