No truck or bus, except a school bus, shall be stopped wholly or partially on the traveled portion of any highway outside of cities and towns for the purpose of taking on or discharging cargo or passengers unless the operator cannot leave the traveled portion of the highway with safety. A school bus may be stopped on the traveled portion of the highway when taking on or discharging school children, but these stops shall be made only at points where the bus can be clearly seen for a safe distance from both directions.
Va. Code § 46.2-893