Anti-Icing on roads
couple weeks ago, on the way of my business trip to Toronto I saw this automated Anti-Icing machine, that encouraged me dig deeper about the liquid which is being used and how the system works in general.
Anti-icing is a proactive snow and ice control strategy. A small amount of liquid chemical such as road salt (sodium chloride, NaCl), calcium chloride (CaCl2), or magnesium chloride (MgCl2) is applied to pavements and bridge decks before a storm to prevent ice from bonding with the surface. Anti-icing is commonly used on pavements where the policy is to provide a high level of service or a bare pavement. It has proven very effective at preventing bridge deck and pavement frost. Specialized equipment is needed to apply small amounts of liquid chemicals. Detailed weather predictions are also helpful to avoid wasting material since the efficiency is very up to weather conditions.
An anti-icing strategy can produce significant benefits:?
? Better pavement conditions (improved friction) can be achieved, reducing the number of crashes. (One study in Idaho reported 83% fewer crashes)
? Less chemical is required to prevent ice bonding than to remove ice after it has bonded to the pavement.?
? Anti-icing applications are reported to last for several days, particularly in preventing frost on bridge decks.?
? Clean-up after a storm may be easier with less ice bonded to pavement.?
? Application can be made during regular working hours, reducing some overtime costs.?
? Fixed liquid spray systems at bridges and intersections are possible.
When to anti-ice
? Anti-icing should be the first in a series of strategies considered for each winter storm.
? Anti-icing should be conducted prior to forecasted frost, freezing fog, or black ice events on bridge decks and pavements.
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"Remember, 'The best preparation for tomorrow is doing your best today' - H. Jackson Brown, Jr. ?? Your focus on road safety and maintenance is truly paving the way for a safer tomorrow in Canada! ?????? Keep up the great work!"