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PennDOT Restricts Certain Vehicles on Interstate 79

    Due to the severity of the winter storm, PennDOT is temporarily restricting certain vehicles on Interstate 79 in the northwest region.  

    Vehicle restrictions reflect Tier 1 of the commonwealth’s weather event vehicle restriction plan, and are in effect on the following roadways: 

    Under Tier 1 restrictions, the following vehicles are not permitted on affected roadways: 

    • Tractors without trailers; 

    • Tractors towing unloaded or lightly loaded enclosed trailers, open trailers or tank trailers; 

    • Tractors towing unloaded or lightly loaded tandem trailers; 

    • Enclosed cargo delivery trucks that meet the definition of a CMV; 

    • Passenger vehicles (cars, SUV’s, pickup trucks, etc.) towing trailers; 

    • Recreational vehicles/motorhomes; 

    • School buses, commercial buses and motor coaches; and 

    • motorcycles. 

    Speed limits will be restricted to 45 mph on these roadways for all vehicles while the vehicle restrictions are in place, and commercial vehicles not affected by the restrictions must move to the right lane. Additional speed restrictions on other interstates could be added depending on changing conditions. 

    The purpose of the restriction is to help ensure the interstates remain open during the most challenging conditions of the winter storm. When conditions improve, PennDOT will remove the travel restrictions.  

    Restrictions will be communicated via variable message boards, the 511PA traveler information website at and smartphone apps. Motorists can also sign up for alerts on the website. 

    Although PennDOT crews are treating roadways, the department’s primary goal is to keep roads passable, not completely free of ice and snow. PennDOT will continue to treat roadways throughout the storm until precipitation stops and roads are clear. 

    While PennDOT recommends not traveling during winter storms, motorists can check conditions on more than 40,000 roadway miles, including color-coded winter conditions on 2,900 miles, by visiting 511PA, which is free and available 24 hours a day, provides traffic delay warnings, weather forecasts, traffic speed information and access to more than 1,000 traffic cameras.  

    511PA is also available through a smartphone application for iPhone and Android devices, by calling 5-1-1, or by following regional Twitter alerts

    For more winter driving tips and information on how PennDOT treats winter storms, visit  

    Subscribe to PennDOT news and traffic alerts in Crawford, Erie, Forest, Mercer, Venango, and Warren counties at

    Follow PennDOT’s northwest region on Twitter or Facebook.



    MEDIA CONTACTS: Saxon Daugherty, 814-678-7095


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