Jackknifed tractor-trailer has traffic slow-going on Route 1

There's traffic trouble on Route 1 northbound in Bucks County, not far from the Delaware River and New Jersey border.

SKYFOX shows a tractor-trailer jackknifed in the northbound lanes, just past the Oxford Valley Mall interchange.

It happened at about 7:40am.

Right now, it looks like the left lane is blocked.