NYC's subway track geometry car blends high- and low-tech

mta track geometry car
CC BY 3.0 Adam E. Moreira, Wikipedia

Beneath the city that never sleeps, MTA's "track geometry car" worms its way through New York's subway tunnels, using a menagerie of sensors and cameras to inspect the tracks. Geoff Manaugh at Bldg Blog is captivated:

But it's hard not to be captivated by the idea of some blindingly well-lit behemoth vehicle maneuvering around beneath the city at night, all lasers, mirrors, lenses, and prisms—a surreal, moving garden of repurposed photographic equipment and motion-capture technologies from different historical eras—scanning the geometry of the metropolis from below, down to thermal flaws in the very metal it passes over.

I find this use of high-tech tools to improve a low-tech transportation system fascinating. If you want to geek out, there are a bunch of videos of this train on YouTube.

More at Bldg Blog.

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