“Anatomy of a pothole”

I drive a lot through New York City—-and everyday I find myself wondering HOW the potholes in the road just get bigger and bigger.  They fix them, they come back.   After several years of commuting by car through NYC city streets; I have learned areas where the road is worse than others, in my mental data bank of pothole summaries.  That being said, there are always new surprises which bubble up.

So how are potholes made!?

“It’s hard to believe those chasms in the pavement aren’t the remnants of miniature explosions. Instead, they’re carved by plain old water. The process usually starts with one little crack that fills with H2O. When water freezes, it expands, and when the water inside the crack expands, it pushes the asphalt outward and upward—a lot like when you forget a soda in the freezer and return to find a frozen volcano bursting from the bottle. “

read the rest of this interesting article here:
Anatomy of a Pothole – U.S. Roads and Infrastructure – Popular Mechanics

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