re: I-55/ I-12 interchange

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The one in Mississippi is a lot better than the one at I 12 and I 55. The one in Mississippi uses collector-distributor roads so you don’t need to merge onto the main line interstate until you’re up to speed. Look at the picture and you’ll see the parallel roads with i-10.

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Those collector roads do help, but the hair pin turn can get dicey if you try going through them too fast and the road is wet. I couldn’t imagine an 18 wheeler trying to use the ramp faster that 20 mph.