| |Sand or other granular materials should not be applied as anti-skid agents during winter operation because they can quickly clog the system. Winter maintenance practices should be limited to plowing, with [[Salt management|de-icing salt]] applied sparingly. | | |Sand or other granular materials should not be applied as anti-skid agents during winter operation because they can quickly clog the system. Winter maintenance practices should be limited to plowing, with [[Salt management|de-icing salt]] applied sparingly. |