Credit: Traffic is seen on I-95 South at Va. 123 toward Occoquan and Lake Ridge. From Va. 123 North, commuters are provided a mere 100 feet before their acceleration lane tapers into I-95 South. The merge is coincident with a lane-drop on the southbound mainline highway. As four through lanes from Fairfax County turn to three south of the Occoquan River in Prince William County, drivers in the slow lanes must merge right and are often reluctant to yield to ramp traffic. This is one of the region's most notorious bottlenecks.

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