What I always found in that scenario is that the entire freeway would end up slowing down. The people getting over from the right to the right-center lane would slow both lanes down, then people from the right-center lane would get over to avoid that, and so on and so forth until all four lanes were slowed/stopped around that interchange, especially since there are usually high traffic volumes as well. It's a pain to stop there especially if you're going as through traffic, but I guess it's probably better than having these types of accidents if only one lane were to stop.
I guess traffic volumes aren't as high on the I-75 stretch to where that cascading slowdown across all lanes takes place.
That's awful and as a father to a two year old son, that a two year old died as well is especially heartbreaking.
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