i-395 contains a third roadway: reversible, barrier-separated virginia hot lanes with their own entrances and exits, also known locally as the "express lanes", between south eads street near the pentagon in arlington county and state route 610 (garrisonville rd.) in stafford county, virginia. during morning and evening rush hour, traffic on this roadway flows in the direction of rush-hour traffic. at these times, the road may only be used by vehicles containing three or more passengers and by motorcycles, alternative-fuel cars, hybrids registered in virginia before july 1, 2006, and law enforcement vehicles. at other times, the road is either open to all traffic in one direction or closed to all traffic. in 2012, the exemption was modified to be "open-ended" rather than year-to-year.