The Internet at the Speed of Thought

Here’s What Those Long Black Tubes Across the Road Are Really For

at5:45 pm | By

Next time you see one, you'll know!

We’ve all seen it: You’re driving across the road when suddenly—and seemingly out of nowhere—you cruise across an inconspicuous black tube laid across the street.

Should you slow down now, or is it too late already? Do these things even measure speed? Do they measure anything at all?

As it turns out, these tubes are helpful tools used across the world as in-roadway sensors, and they gather much more information than you might think. But what exactly are they doing? Keep reading so that you’re ready the next time you come across one of these on the street!

pneumatic tube road feature

Credit: YouTube/CityofBloomingtonMN; Shutterstock/Gary Perkin