The Board shall adopt policies governing the pruning and trimming of trees during nonemergency conditions by the employees, agents, and contractors of the Department of Transportation in order to preserve roadside trees that do not adversely affect highway operations, maintenance, or safety. Such policies shall be developed in consultation with an advisory group whose members shall include representatives of the Department of Transportation, the Department of Forestry, Scenic Virginia, and the American Society of Consulting Arborists and shall be consistent with generally accepted standards recommended by nationally recognized organizations, including the American National Standards Institute.