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PHILADELPHIA (CBS) – Speed restrictions have been issued on the Pennsylvania Turnpike due to weather conditions on Thursday.

School Closings 

The PA Turnpike has lowered the speed limit to 45 miles-per-hour from the Donegal Interchange (exit 91) in Westmoreland County to the Delaware River Bridge (milepost 359) in Chester County, as well as on the Northeastern Extension (I-476) to the Lehigh Valley Interchange (exit 57) in Lehigh County.

While driving in severe weather, officials advise drivers to:

• Always travel at a safe speed for conditions, no matter what the posted limit is

• Allow plenty of space when driving near plow trucks

• Never pass a truck that is actively plowing or spreading salt.

In case of an accident on the PA Turnpike, motorists should dial *11 on a cellphone and have the nearest milepost location available.