NYC subway flood dam.
<video controls autoplay loop style="max-width: 100%;">
<source src="https://diqn32j8nouaz.cloudfront.net/tooltalk_17681893217654.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>
Previously:
1952 subway tunnel cleaning machine - photo
How NYC subway signs are made - GIF
Miniature in-wall subway - GIF
NYC moving subway platform - GIF
NYC subway safety alcove - GIF
