I’ve been travelling that road and most other highways in PA for many years; mass accidents are, sadly, common in winter weather. Same goes for multiple fatality accidents. Winter driving in this state is NOT for rookies or the faint of heart.
I-81 in PA is especially treacherous, especially between Scranton and Harrisburg. Narrow lanes, lots of hills and tractor trailers everywhere.
When my daughter had her permit, I gave her a lesson in stress driving. PA Turnpike, rush hour, full size van.
She handled it well and I never worried about her driving again.
Truth. I lived in PA before and those roads get dicey during winter.
I can never figure out why people drive like maniacs in such terrible weather.