Grand Canyon Times

A menacing wall of dust appears in the distance, suddenly blocking the sun as visibility drops to almost nothing.

Blasts of wind scatter tree branches that block traffic lanes and dust gives way to torrents of rain that flood roadways.

Drivers who don’t know how to respond can be shaken, stranded or even injured. That’s why the Arizona Department of Transportation is kicking off Monsoon Awareness Week (June 13-17) by sharing important safety information so motorists are prepared for dust storms and severe weather.

The agency’s most important advice is the simplest: “Pull Aside, Stay Alive.”(link is external) 

To help drivers minimize hazardous situations or injuries, motorists should keep in mind some practical tips to avoid the worst of the severe storm season:

• Avoid driving into or through a dust storm.
• If you encounter a dust storm, immediately check traffic around your vehicle and begin slowing down.
• Don’t wait until poor visibility makes it difficult to pull off the road - pull aside as soon as possible and exit the highway if you can.
• Don’t stop in a travel lane or in the emergency lane. Look for a safe place to pull completely off the paved portion of the roadway.
• Turn off all vehicle lights, including your emergency flashers. You don’t want other vehicles approaching from behind to use your lights as a guide, possibly crashing into your parked vehicle.
• Set your emergency brake and take your foot off the brake.
• Stay in the vehicle with your seat belts buckled and wait for the storm to pass.
• Drivers of high-profile vehicles should be especially aware of changing weather conditions and travel at reduced speeds.

ADOT’s efforts to promote safety include an innovative, first-of-its-kind dust detection system along a 10-mile section of Interstate 10 between Eloy and Picacho Peak. Motorists traveling in this area will see electronic variable speed limit signs, overhead message boards and weather radar that work together to warn drivers of reduced visibility or approaching storms.

If blowing dust reduces visibility to levels that affect safe travel, the system automatically reduces speed limits from 75 mph to as low as 35 mph. Also, overhead message boards will warn drivers of reduced visibility and the need to slow down for safety. 

The system first went into use in 2020 and successfully activated itself during dust events. Data from sensors in the roadway show drivers slow down when variable speed limit signs drop the posted speed limit, thereby helping drivers move through the area more safely.

To alert drivers of approaching storms, ADOT employs an array of tools, including posting messages to overhead highway signs, the 511-travel information line and social media, including Twitter (@ArizonaDOT(link is external)) for up-to-the-minute conditions. During dust storms, ADOT’s Traffic Operations Center staff is in constant communication with crews and law enforcement officers in the field, as well as partner agencies, to keep current information flowing to motorists.

Original source can be found here.