(Hillsboro, OR) -- Washington County is warning drivers there could be delays in getting roads plowed when it snows. The Washington County Transportation Department is short about a quarter of its drivers. Crews will focus on plowing priority routes first which include major corridors and routes used by emergency services. New and current plow drivers have been traveling priority routes, so they're ready. The County is asking drivers to be patient and take precautions if they must drive in wintry conditions.