The accident happened on the westbound entrance from Hope Township.
A westbound ramp onto Interstate 80 was shut down early Wednesday afternoon in Warren County after a tractor-trailer jackknifed, the New Jersey State Police and department of transportation report.
The DOT posted an alert on 511nj.org at 1:36 p.m., saying the ramp from Route 521 in Hope Township was closed in that direction. Traffic on the highway appeared unaffected.
State police at the nearby Hope barracks said the vehicle brought down a tree. The driver was taken to Hackettstown Medical Center with undisclosed injuries.
There was no immediate estimate when the ramp would reopen.
Steve Novak may be reached at snovak@njadvancemedia.com. Follow him on Twitter @type2supernovak and Facebook. Find lehighvalleylive.com on Facebook.