Concrete road surface question

The worst place for what you describe, in my experience, is presently the remaining original concrete segments of I-55 in Arkansas; it was I-40 in Arkansas, around the White River crossing between 202 and 193, but they finally rebuilt that stretch.

I also noticed that Arkansas has been building new concrete pavements with a layer of asphalt underneath; this is the correct way to do it, and lasts quite a bit longer than just plopping down the pavement directly on top of a crushed aggregate base. It also provides a smoother surface for the pavement laying machine to ride on, resulting in a smoother concrete pavement.

 

Yes, the new pavements have dowel pins at the joints again. Epoxy coated now, so they don't corrode (which was the reason they abandoned their use for awhile). Dowel pin retrofits are only done on the older pavements that didn't have the dowel pins at joints in the first place.