Highway maintenance workers keep roads clean and in good driving condition. Typical highway maintenance duties involve repairing guard rails, fixing highway signs and markers, removing debris and trash, mending snow fences, and driving heavy trucks to transport crews and equipment to work sites. Depending on the design of the roadway, highway maintenance workers may also mow grass and weeds along the roadside, inspect structures such as bridges, tunnels, and drainage systems for damage, and repair road shoulders. As a highway maintenance worker, your job duties vary depending on the climate where you live and work.