Various roads throughout Northern Virginia have been designated for immediate snow removal so emergency vehicles can use them. When snow is in the forecast, law prohibits your stopping or impeding traffic on these routes. Lifting HOV restrictions is a joint decision made by VDOT and Virginia State Police. The restrictions are lifted during snow storms only when it is needed to improve traffic flow on the regular lanes of that road. Every year the street next to mine gets plowed, and my street is passed by until much later.
Many subdivisions have more than one plow assigned to clear their streets.
If the plow you see doesn't get to your street, it means another one has been assigned to your part of the neighborhood and will be along soon. If the road is a state road, VDOT is responsible for clearing it. Call 911 immediately. If they need help getting to you, they will work with VDOT to get the road cleared. VDOT does not remove snow from sidewalks, concentrating instead on making the roads safe.