Update, 4:16 p.m.: In a news release, WSP said the driver was a 58-year-old man from Elma, WA in Grays Harbor County.
The man was driving northbound on state Route 509 just south of Port of Tacoma Road, when the trailer detached from his truck and hit the barrier in the median.
Watts told The News Tribune the barrier broke into 24 pieces, which is why the clean-up is taking a long time…