The state Department of Transportation says I-95 northbound was closed for several hours after an early morning crash that caused a truck to spill some methanol on the highway.
The highway was closed northbound between exits 6 and 9 as crews worked to clean up the mess, and the backup from the 2:30 a.m.
accident stretched for miles during much of the morning rush. The highway was reopened just after 6:30 a.m.
Authorities say southbound traffic also was affected as lanes on that side of the highway were closed during the cleanup effort.