Maybe you've had the same question as our Facebook friend, Barbara. She wants to know: "Why do surface streets get potholes but highways hold up through the winter?"

"On our highways, we're dealing with heavier traffic," says Amanda McFarland with ODOT. "So the asphalt mixes that we use, we add some additives and modifiers to help keep that pavement really bonded together so there aren't any cracks when the really heavy traffic is traveling over it."

She says they even lab test samples of the asphalt to make sure the added glue-like substance can withstand the semis and heavy loads.

Highways are also built to last.

"When we build the pavement new and original, we build it with a 20-year life cycle," McFarland explains.

That life cycle is extended with a "mill-and- fill" process where the top two inches is taken off and replaced.

Keep in mind, potholes are caused by water getting into a crack in the pavement, freezes and then thaws.

ODOT has crews working around the clock to find imperfections on your drive into work.

"Their slogan is no pothole left behind."

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