I think more than 50% of american drivers, specially the ones in texas would need to retake the driving test if roundabouts were implemented, bubba in his pickup truck usually doesnt care about road laws, forget roundabouts, he would go over them.

Where I grew up, the second thing you are taught in driving is how to negotiate is a roundabout. First being the vehicle controls (and you are taught driving in a manual trans not auto)

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)