Most notably, a 91-mile stretch of Interstate 77 from Rock Hill to Cayce recorded 90 fatal crashes between 2019 and 2023. That total ranks the corridor among the most dangerous interstate segments nationwide.
Two other major South Carolina highways also ranked high nationally. Interstate 95 finished as the fourth-deadliest interstate in the country, while Interstate 85 ranked fifth overall.
The 30 Most Dangerous Interstate Highway Segments by State
Rank Interstate State Segment State Segment Length (mi) Number of Fatal Auto Accidents 2019–2023 Number of Fatal Auto Accidents per Mile
1 I-94 Illinois 61 122 2.00…