π Locomotive is one of the animated emoji in Google's Noto Emoji Animation set β the same locomotive emoji (U+1F682) drawn as a short looping Lottie animation. Lottie files are vector, so the animation stays sharp at any size and is usually much lighter than a GIF or a video.
π is the locomotive emoji, part of Unicode's Travel & Places group, added in Emoji 1.0 (2015). Unicode's keyword list links it with βcabooseβ, βengineβ, βrailwayβ, and βsteamβ.

