(BPT) – Across the U.S., more than 70 percent of the population lives in areas affected by snow and ice. Each winter the average driver in these areas will see more than 5 inches of snow on the roads. And when the snow is falling there are few things more comforting than the sight of snowplows and salt trucks making highways safe for commuters, shoppers and travelers.
According to the Federal Highway Administration, snowy, slushy or icy pavement accounts for more than 116,000 Americans injured and over 1,300 killed each year. In fact, 24 percent of all weather-related vehicle crashes occur under such wintry conditions. A study by Marquette University found that effective use of road salt reduced vehicle crashes by 88 percent, injuries by 85 percent and the cost of accidents by 85 percent.
In the Snow Belt, citizens expect roads to always be cleared of snow and ice, no matter how bad the storm, says Bret Hodne, public works director for West Des Moines, Iowa. To help meet those sky-high expectations, Hodne orders salt months before the first snowflake falls. His motto is “don’t trust your climate” because if you plan for an average season, it’s bound to be a record-setting winter of snow and ice.
Salt was first used in the 1930s for snow and ice control, but it wasn’t until the 1960s that salt became widely adopted by snowfighters as one of the major weapons to keep winter roads safe. In an average Iowa winter, Hodne’s department alone uses 4,000 tons of salt and keeps twice that amount in storage. Salt works by lowering the freezing point of water and when applied on already frozen roadways (deicing) it helps to melt the ice. When salt is applied before a freeze sets in (anti-icing) it helps prevent liquid water from becoming ice. This is why drivers will often see salt trucks out and about before the roads start to freeze.
Both methods give tires more traction with the pavement, keeping roads open and safe while protecting lives and commerce. How quickly salt melts frozen water is dependent upon a number of variables, including temperature, time and the rate of application. Fortunately, it is usually not necessary to melt all the snow and ice on a road. Merely destroying or preventing the bond between pavement and frozen water is a more efficient, economical and environmentally sensitive approach. In fact, salt is the single most effective and economical method for treating roadways.
In addition to enhancing the safety of our roads in winter conditions, those snowplows are doing a lot to improve mobility. Snowfighters reduce weather-caused delays and congestion, allowing for emergency vehicles to respond more quickly when people need help, making for shorter travel times for families, allowing kids and parents to get to school and jobs safely and on time.
In fact, a study by IHS Global Insight for the American Highway Users Alliance found that snow- and ice-related delays and shutdowns hurt hourly workers the most. This study also placed a monetary value on fast and effective snow removal and salting. According to the researchers, a state can incur economic losses of between $ 300 million and $ 700 million every day that roads are closed and impassable. So, those snowplows are not just helping keep families together and safe, they are helping to keep the lifeblood of our commerce pumping during winter storms – a thing for which we can all be thankful!
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