Va. Code § 46.2-907
A person riding a bicycle, electric personal assistive mobility device, electric power-assisted bicycle, motorized skateboard or foot-scooter, or moped may overtake and pass another vehicle on either the left or right side, staying in the same lane as the overtaken vehicle, or changing to a different lane, or riding off the roadway as necessary to pass with safety.
A person riding a bicycle, electric personal assistive mobility device, electric power-assisted bicycle, motorized skateboard or foot-scooter, or moped may overtake and pass another vehicle only under conditions that permit the movement to be made with safety.
A person riding a bicycle, electric personal assistive mobility device, electric power-assisted bicycle, motorized skateboard or foot-scooter, or moped shall not travel between two lanes of traffic moving in the same direction, except where one lane is a separate turn lane or a mandatory turn lane.
Except as otherwise provided in this section, a person riding a bicycle, electric personal assistive mobility device, electric power-assisted bicycle, motorized skateboard or foot-scooter, or moped shall comply with all rules applicable to the driver of a motor vehicle when overtaking and passing.
Va. Code § 46.2-907