I’m always wondering what the purpose of those odd black tubes in the road is used for. Fortunately, I finally found the answers to those weird black tubes. And no, it’s not a goofy elaborate watering system.
The official name for these ominous road snakes is just “pneumatic road tube,” and if you guessed that they probably just take a traffic count, you are mostly correct. But they also do so much more!
They are used for short-term traffic counting, vehicle classification by axle count and spacing, planning, and research studies. Read the full story here ▶
