How does a snow fence work?

You've probably seen these orange fences here and there this winter. What do they do and how do they work?

Field testing site showing the position of the road, snow fence, marker

Transportation Defined: Snow Fence

Snow Fence Installation Instructions

Anti-drifting Measures - Living Snow Fences

A Change of Seasons, sort of…

Snow fence placement question

How does a snow fence work?

How to Install a Snow Fence (with Pictures) - wikiHow

How To Install A Snow Fence - Resources Hub - Resources

Transportation Defined: Snow Fence