. >> reporter: chris hoge fills up before snow hits northwest d.c. difficult to get to a pump. might be more difficult to get around. >> reporter: tonight's d.c. department of public works loaded up these trucks with salt brine to help prevent icy roads. the trucks will drop it on primary and secondary roads and neighborhoods. >> i live on a hill. so anytime the rain or the snow comes down and freezing it tends it turn into ice. >> you see what is going on outside. right now we're inside at the department of public works snow xlaern command center. you see right here these boxes. each one represents a snow plow. each snow plow has a gps on it, and it allows people in this room to know what roads have been treated, what roads still need to be treated, and right over here these are the busy intersections throughout the district. >> for motorists tomorrow morning we're going to be working throughout the night. >> reporter: christopher shorter is the d.c. department of public works director. he says 200 trucks will be sent out at 1:00 in the morning to treat roads. >> we've had tem