A semi-trailer that caught on fire is blocking two northbound lanes on I-95 just before Exit 64 to the Baltimore Beltway, Maryland State Police said Friday night.

Traffic is moving in two lanes and a shoulder is open, police said. Traffic was backed up for several miles at 10:30 p.m.

A tow truck was on the scene, police said.

Authorities are encouraging drivers before Exit 49 to use I-695 as an alternate route.

Drivers beyond Exit 49 should use U.S. 40 at Exit 61, authorities said.