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Fog Safety on Farms

Fog hides the road, the gate, the ditch and the other driver. Slowing down, making yourself seen and sometimes waiting are the best defenses.

Why is fog dangerous around a farm?

Fog cuts how far anyone can see, and it hides slow-moving farm equipment from drivers on public roads. It also hides ditches, edges, livestock, people and overhead lines in yards and fields. Early morning and late evening, when farm work often starts or ends, are common fog times.

The National Weather Service issues fog and visibility advisories in many areas. Check your local office for how it reports them.

Drivers behind farm equipment in fog may not realize how slow it is moving until they are close. That is why lighting and visibility aids matter, and why public road moves in dense fog carry real risk.

• Slow equipment is hard to see
• Hazards hide in yards and fields
• Fog is common at shift start and end

How should you travel on public roads?

If visibility is poor, consider delaying equipment moves on public roads until it improves. If you must go, use the lights and markings that your state allows and requires, and check your state agriculture or transportation agency for rules, because they differ.

Drive slowly enough to stop within the distance you can see. Keep windows and mirrors clean. Do not stop in the traffic lane if you can avoid it, and use a lead or follow vehicle if your state allows it.

If you rely on a flashing light or slow-moving vehicle emblem, keep them clean and replace them when faded. Check state rules on what is required and what is allowed.

• Delay moves when possible
• Use lights and markings required by your state
• Slow down
• Avoid sudden stops in the lane

What can you do in the yard and field?

Keep work areas lit, and keep lights, reflectors and warning devices clean and working. Walk the area before moving equipment, and use a spotter where people may be behind a machine. Agree on hand signals or radio calls.

Do not assume people see you. Workers on foot should wear high-visibility clothing, and you should confirm everyone's location before starting a machine.

Fog often forms with calm air and moisture, which also means sound may carry differently. Do not count on hearing a machine or a shout to know where someone is.

How does fog affect animals and livestock work?

Livestock near roads or fence lines can be hard to see and can wander. Check fencing and gates, and make sure that animals are not near road edges in dense fog. If animals are loose on a road, call the local sheriff or 911 and warn drivers if you can do so safely.

Handling animals in poor visibility increases the risk of kicks and crush injuries. Wait for better light where possible.

Check cattle guards, gates and fences each season, and teach drivers where animals are normally kept. Reducing the chance of animals reaching a road is the best fog plan.

What if you are caught in dense fog?

Follow official driver guidance for low visibility from your state transportation agency or the National Weather Service. If you cannot see safely, pull off the road as far as you can and wait, and use hazard lights in line with local rules. Do not rely on memory for what the safest action is; check the official source ahead of time.

Keep a charged phone, and tell someone your route. Call 911 in an emergency.

Fog can persist for hours, so build in schedule flexibility. A late start is a small cost compared with a collision.

How can you build fog planning into daily routines?

Include visibility in your morning weather check. Set a clear rule for when work or travel waits. Discuss lighting, markings and signals with all workers, including seasonal and young workers, and update it as equipment changes.

Review incidents and near misses together. Fog often exposes weak habits that otherwise do not matter, such as dirty lights, worn reflectors and unclear communication.

Hold a short refresher with all workers at the start of the fall and winter seasons, when fog is most common in many areas.

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