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Fog and Dust Driving Safety

Fog rolls in over fields and dust clouds rise behind machines, and either one can hide a road or a vehicle. Knowing how to slow down, signal and stop safely is the best protection.

Why are fog and dust so dangerous on rural roads?

Both reduce what you can see, sometimes suddenly. A dust cloud from a passing truck or a harvester can hide the road for several seconds, and fog can thicken over low ground without warning.

Other drivers may not see your machine until they are very close, and you may not see them either.

Fog is most common in the early morning and evening and often forms in low areas near water, so the same road can be clear on a hill and dense in the valley. Plan for that change before you reach it.

What should I do before I start driving?

Check the weather and forecast, including any fog or wind alerts from the National Weather Service. If conditions are poor, consider delaying the trip or choosing a different route.

Clean windows, mirrors and lights, and test the defroster and wipers. Make sure the slow-moving vehicle emblem and marking are clean.

Keep a small cloth and cleaner in the cab. Moisture and dust build up inside the glass as well as outside, and a quick wipe often restores a surprising amount of view.

• Check the forecast and local alerts
• Clean glass, mirrors and lights
• Test defrosters and wipers
• Tell someone your route

How do I drive in fog?

Slow down and turn on the lights your manual and local rules call for, using low settings that suit the conditions. High settings can reflect off the fog and reduce your view. Use signals early.

Use the edge of the road or the lane markings as a guide, but do not follow the taillights of another vehicle too closely. If it is too thick to see, pull off as far from traffic as you can and wait.

Do not rely on cruise features or guidance systems in fog. Stay engaged, keep your hands on the wheel and expect to slow down further at any intersection or driveway.

How do I drive in dust?

Dust raised by your own machine or another can drop visibility quickly. Slow down before you enter a dusty stretch, keep your distance behind other vehicles and avoid passing in dust.

If the cloud blinds you, ease off the throttle and stay steady. Do not stop abruptly in the road, since a driver behind may not see you. Pull off safely when you can.

If you are the one raising the dust, think of those behind you. Slow down on dry gravel, and wait for a lull in the wind if you are crossing a road with a loaded cart.

• Slow down before entering dust
• Keep distance behind other vehicles
• Do not pass in a dust cloud
• Pull off safely when you cannot see

How do I handle breakdowns or stops in poor visibility?

Move completely off the road if you can. Turn on hazard lights and stay away from the traffic lane. Do not stand behind or beside the machine where a passing vehicle may strike it.

Call for help, and call 911 if anyone is hurt or if the machine is a hazard to traffic. Warning devices and procedures are described in training from official sources, so ask your extension office or highway patrol.

What can I do on the farm to reduce dust?

Where possible, work out routes that reduce dust on public roads and avoid moving at times when wind carries it across the road. Speak with neighbors if shared roads create a problem.

Wear respiratory protection that is right for the job when dust is heavy in the field. Ask AgriSafe Network or your extension educator about proper protection and fit, since the right choice depends on the hazard.

Dust in the field is also a health issue. Ask your doctor about any breathing problems after dusty work, and mention farm exposure so they understand your situation.

• Choose routes that limit dust on public roads
• Talk with neighbors about shared roads
• Ask about proper respiratory protection

When should I simply not drive?

Some conditions are not safe for any trip. If you cannot see far enough to stop, wait. Losing an hour is better than a crash, and your crew should know that you support that choice.

Make it a rule that nobody is pressured to drive in poor visibility, and review it each season.

Supervisors set the tone. When a manager says that a late delivery is acceptable if the road is unsafe, workers feel free to make the same sound decision on their own.

Last reviewed: November 12, 2026. Written by the Farm Safety Editorial Team. See our editorial policy.