Which vehicle restrictions are in effect in Pa. during the storm? Read this before you leave. Updated Feb 18, 2021; State officials are asking residents to avoid unnecessary travel during Thursday’s snow storm, but if you have to head out, there are vehicle restrictions on many of the Lehigh Valley’s major highways. The heaviest precipitation was forecasted for mid-morning to mid-afternoon Thursday, with most calling for between 4 and 8 inches of snow. While major roads were plowed or salted Thursday morning, by the 11 a.m. visibility was bad and many were snow covered. Multiple crashes were reported in the early morning on I-476 and Route 422, including a multi-vehicle crash at about 8:19 a.m. on Route 422 at Penn Avenue in the Reading area.