re: Why can't Louisianians comprehend traffic circles? OP Update

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The one at dalrymple/lakeshore is pretty shitty design.. but it is more efficient than that old T intersection.

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Traffic circles are ideal for T intersections like that with moderate/light traffic. They are much more efficient. There are a handful in Central now, and I think they are installing a few in Livingston Parish.

I would not put one where there is constant gridlock unless there is adequate space for a very large diameter circle. I also would not put them on major highways where highway traffic should take priority, such as US 61 or US 190.