I assumed they used antifreeze in places where it freezes. Maybe not applicable in extreme cold, but seems to be good down to -40 or so. http://www.dot.ca.gov/

I assumed they used antifreeze in places where it freezes. Maybe not applicable in extreme cold, but seems to be good down to -40 or so. http://www.dot.ca.gov/hq/esc/oe/project_ads_addenda/05/05-0T0004/supplemental_info/05-0T0004IH.pdf http://www.dot.ca.gov/hq/esc/oe/project_ads_addenda/05/05-0T... Some customers have indicated that common deicing and dust control chemicals that are used on the highway make excellent choices for antifreeze agents. These include: * Calcium Chloride (CaCl2) * Calcium Magnesium Acetate (CMA) * Potassium Acetate (KAc)