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Iowa Project Finds Blue, White Lights Make Snowplows Safer

Wed November 28, 2018 - Midwest Edition #24
Iowa DOT


At the end of a pilot project, the Iowa Department of Transportation has determined that adding blue and white lights to its snowplows helps reduce rear-end and sideswipe crashes in blizzard conditions.
(Iowa DOT photo)
At the end of a pilot project, the Iowa Department of Transportation has determined that adding blue and white lights to its snowplows helps reduce rear-end and sideswipe crashes in blizzard conditions. (Iowa DOT photo)

To make its snow plows more visible during blizzard conditions, the Iowa Department of Transportation embarked on legislatively approved pilot project three years ago to add rear facing blue and white lights to the already existing amber-colored lighting systems on about 200 of its snowplows in central Iowa.

The agency noted in a recent blog post that the addition of blue and white lights helped reduce rear-end and side-swipe crashes with motorists from between 14 and 15 incidents per winter operation season to between four and six incidents.

"Our proposal was to create a lighting scheme that isn't found on any other vehicle," Tina Greenfield of Iowa DOT's maintenance office noted in a statement.

"We used blue, white and amber flashing in succession to make it unique to a plow. The rotating amber lighting is visible 360 degrees, but the blue-white-amber lighting is only visible from behind the plow," she said. "This gives drivers an early warning that there's a plow ahead. Since rear-end collisions are the most common, we expected to and have seen a significant reduction in crashes with the new lighting system."

With the proven success of the pilot project, the Iowa DOT said it is now finishing installation of the new blue-white-amber lighting package on all of its 670 snowplow trucks at a cost of roughly $500 per vehicle or $335,000 for the entire fleet.

The agency added that the cost of adding the new lighting system to its snow plows is less expensive than the average cost of repairing equipment most often damaged in rear-end and side-swipe collisions, with crash-damage to salt spreaders averaging between $2,000 and $3,000, with wing plows averaging $5,000 to $10,000.

"The cost of the additional lighting can be recouped very quickly," noted Craig Bargfrede, Iowa DOT's winter operations administrator, in a statement. "Plus, having fewer trucks in the shop for repairs following crashes not only saves us time and money, it means more trucks are available to clear the roads."




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