UPDATE: PennDOT lifted the restrictions around 10 a.m. Thursday morning.
PennDOT has temporarily restricted certain highway vehicles and reduced speed limits from 9:30 p.m. Wednesday.
The same restrictions shall continue to apply on Thursday mornings and Articles 33, I-78, I-80, I-81. And I-380.
Commercial vehicles may not be used on those highways, except loaded trailers with towing devices or chains permitted under PennDOT.
School buses, motorhomes and cars / SUVs / vans towing trailers are also restricted from motorway traffic until further notice.
As for speed limits, all of the highways listed above are limited to 45 mph in addition to U.S. 209, U.S. 222, PA 309, and 422.
If you still need to travel while these restrictions are in effect, PennDOT recommends that you visit 511PA.com to update the terms and conditions.