The occupation, 'Highway Maintenance Workers', include: Asphalt Raker, Caltrans Equipment Operator, Equipment Operator (EO), Flagger, Highway Maintainer, and other titles.Highway Maintenance Workers maintain highways, municipal and rural roads, airport runways, and rights-of-way. duties include patching broken or eroded pavement, repairing guard rails, highway markers, and snow fences. may also mow or clear brush from along road or plow snow from roadway.