Redding officials are explaining why the roads might still have snow and ice on them after yesterday's storm. First Selectman Julia Pemberton says in a storm like this, “the best practice” is to treat with salt and then not to plow again because, in doing so, the highway department will plow all the salt off the roads, causing them to ice over. Pemberton says leaving a bit of snow on the road helps to absorb sleet and reduce icing. Each highway plow has GPS tracking so Redding officials know where each has been and at what time. Pemberton thanked residents for their patience.