The speed limit on

,

, Route 309 and

in the Lehigh Valley has been reduced to 45 mph as heavy snow falls, the

reports.

The Northeast Extension of the Pennsylvania Turnpike (Interstate 476) was later added to the list.

PennDOT recommends people not drive during winter storms, but highway updates are available at its

.

Motorists are asked to leave plenty of space near plow trucks and request drivers don't pass plows, according to a news release.

Lehigh County dispatch said there were no closures just before 9 o'clock, but traffic was moving slowly on Interstate 78 West in the area between Route 145 in Upper Saucon Township and Summit Lawn in Salisbury Township due to a truck fire. The lanes were open, but traffic was getting by at a trickle. It was cleared by mid-morning.

Highways in

and

counties are also showing slower speeds at this hour, according to the

.

A tractor-trailer that left the highway on Interstate 78 West at Exit 24 in Tewksbury Township had forced the closure of multiple lanes earlier this morning, but New Jersey State Police at the Perryville barracks said only the right lane remained closed and traffic was getting by slowly. All lanes were temporarily closed at 10:10, the New Jersey Department of Transportation said.

The right lane remained closed just before noon and the delay was 20 to 25 minutes, the DOT said.

The state of New Jersey is keeping an eye on this week's stormy weather pattern and New Jersey State Police ask drivers to be careful, according to a new release.

"We are closely monitoring this week’s weather patterns with our partners from the National Weather Service, N.J. state agencies, and the county offices of emergency management. Be especially careful if you must travel. The driving conditions today and tonight will be difficult. We are asking New Jersey residents to stay informed about conditions, review preparedness plans, and check on family members and friends who are elderly, disabled or isolated, " Col. Rick Fuentes, state police superintendent and director of the New Jersey Office of Emergency Management, said in the release.