Arizona DOT says dust detection and warning system working as designed

One 20-minute storm event, where visibility dropped to less than 300 ft, provided measurable data for the system

November 05, 2020 / 1 minute read
Arizona DOT says dust detection and warning system working as designed
Image: Arizona DOT

With its first monsoon season under its belt, the Arizona DOT (ADOT) says data shows that the agency's dust detection and warning system is working as designed.

Though ADOT says the latest monsoon season in Arizona was not the most robust weather event, there was one 20-minute event that provided measurable data. At one point during that storm, visibility dropped to less than 300 ft, triggering the speed limit to drop to 35 mph, which happens incrementally. The loop detectors showed that the average vehicle was driving about 45 mph, a big drop from the normal 75 mph limit.

“We do know that the system is working—it is doing what it’s supposed to,” Kevin Duby, statewide road weather manager, said in an ADOT blog post. “Our next step is to take the data we have to evaluate and determine the efficiencies of the system to improve performance.”

A study from 2010 and 2015 detailed how traffic was impacted by dust storms along this I-10 corridor, showing 83 dust-related crashes with more than half of them occurring within about a half-mile of each other. In 2016, ADOT and its partners began creating a system to help Arizona drivers be better equipped to deal with dust storms. 

The dust-detection technology employed includes overhead message boards, variable speed limit signs, closed-circuit cameras, and short-range detectors for blowing dust, ADOT says. In addition, a long-range weather X-Band radar dish is part of the system, sitting atop a 22-ft-tall pole at the S.R. 87 interchange that can detect storms more than 40 miles away. X-Band is frequency range from 8 to 12 gigahertz. The lower frequencies make this band suitable for the harshest weather conditions, providing high link availability for weather-monitoring radar solutions.



Related Articles

The U.S. Tire Manufacturers Association (USTMA) and its partners today published a state of knowledge report that assessed existing research on the…
July 22, 2021
The Federal Highway Administration (FHWA) recently announced that up to $10 million in grants will be made available through FHWA’s Accelerated…
July 19, 2021
Autonomous shuttle program launches in Yellowstone National Park
Image: Beep
Beep and Local Motors recently announced the launch of Yellowstone National Park’s first-ever autonomous shuttle program, called T.E.D.D.Y. (The…
July 13, 2021
The Federal Highway Administration (FHWA) this week announced a funding opportunity for $60 million in grants to fund new technologies that improve…
July 08, 2021