The top two dangerous stretches of freeway that I know is Dead Man's Curve on I-90 in Cleveland because of a history of accidents, some of which have been fatal. :ded: The other is I-71/75 south of Cincinnati known as the Cut-in-the-Hill, especially before it was reconstructed in the 1990s. Despite the reconstruction, there have been accidents that still occur.
What are other stretches of freeways that are notorious for serious (or even fatal) accidents? This doesn't have to be Interstates but it has to be a freeway.
I-5 in the Terwilliger Curves.
I-84 between Hartford and the NY state line is basically like a 60 mile long Terwilliger Curves interval.
I-76 "Surekill Distressway" in Philadelphia
I-95 through Providence and Pawtucket, RI