The Roseville Public Works crew sweep city streets at least twice a year and more often in environmentally sensitive areas. As soon as weather conditions allow in the spring, crews start sweeping environmentally sensitive areas, high usage streets and center medians. In the fall, sweeping begins once leaves have fallen. Sweeping generally occurs between 7 a.m. and 3:30 p.m., Monday through Friday. Depending on weather conditions, extended hours may be necessary to complete this program.