Rotary snowplow

Operational rotary snowplow Xrotd 9213 on the Rhaetian Railway in Switzerland

A rotary snowplow (American English) or rotary snowplough is a piece of railroad snow removal equipment with a large circular set of blades on its front end that rotate to cut through the snow on the track ahead of it. The precursor to the rotary snowplow was the wedge snowplow.