OIL CITY, Pa. - The Pennsylvania Department of Transportation restored normal speed limits Thursday on all interstates across the northwest region.

State officials had lowered speeds to 45 mph earlier in the day because of a winter storm. All highways in the region have now returned to their usual posted limits.

The change includes Interstates 79, 80, and 376 in Mercer County. It also applies to Interstate 79 in Crawford and Erie counties and Interstate 80 in Venango and Clarion counties. Drivers on Interstate 86 between the New York state line and Interstate 90 may also resume normal speeds.

While restrictions have ended, transportation officials still ask people to avoid travel if it is not necessary. Drivers should remain alert for changing weather and road conditions.