AUSTIN (KXAN) — Your weekend plans may want to include rinsing off your car since the snowy, icy and wet road conditions probably left it a little dirty. Besides the dirt and oils on the road, you will likely be washing off a saltwater solution TxDOT uses to pretreat the roadways before icy road chances. With the recent winter weather in the Austin area, TxDOT put a solution on the roads before icy road conditions could arrive. That solution is called Brine, and if you noticed streaks on the roadway before the winter weather moved in, that was Brine. TxDOT has a fleet of trucks that spray the solution onto the roads. It's a saltwater mixture that actually lowers the temperature at which water freezes. "There are a couple of ways you can combat ice," TxDOT Austin Spokesperson Bradley Wheelis said. "The first is, never let it form in the first place. That's the pre-treatment. "We try to prevent ice from forming, and then when it does form, we come back in with a granular substance that is magnesium chloride, and this helps melt away that ice. We can re-apply the brine, and we do, and that's how we treat the roadways through these ice storms. But we can also use that granular substance as well." The City of Round Rock during Tuesday's winter weather also used sand on the roadways where ice had formed to give drivers more traction. All things considered, you should go ahead and wash off your car so the preventative measures don't rust any parts of your car or damage your paint.