Those tall fences beside snowy highways are not property fences; they catch blowing snow before it reaches the road, while plowing can cost 100 times more

Along many snowy highways, you might see a tall, slatted wall that looks like a farm fence. Its job isn't to mark anyone's land. According to the Federal Highway Administration (FHWA), it's a snow fence, built to stop blowing snow from reaching the road. The agency adds that research has found plowing snow costs 100 times more than trapping it with a fence.

Snow doesn't just fall; it moves