Motorists in the northbound lanes of the interstate were slowed by a crash initially reported at around 1:15 p.m. which led to an hourlong delay in the area of VA-267W and exit 46.
Three lanes were closed, forcing traffic to get by slowly while the crash was investigated and the scene cleared.
According to the Virginia DOT, as of 2 p.m. on Tuesday, traffic was backed up approximately two and a half miles.
No details about the crash have been released.
Check Daily Voice for updates.
Want breaking news in the DMV as it happens, or want to contribute? Join the DMV All Incidents Facebook group.
Click here to follow Daily Voice Reston and receive free news updates.