35 Pa. Stat. § 2107
Any individual, partnership, association, corporation or political subdivision engaged in or preparing to engage in the manufacture, transportation or storage of any product to be used directly or indirectly in the defense of the United States or of this State or in the prosecution of war by the United States or in the manufacture, transportation, distribution or storage of gas, oil, coal, electricity or water or any of said natural or artificial persons operating any public utility who has property so used which he or it believes will be endangered if public use and travel is not regulated, restricted or prohibited on one or more highways or parts of highways may petition the proper authorities of the Commonwealth or of any political subdivision thereof to close one or more of said highways or parts of highways to public use and travel or to regulate or restrict by regulation the use and travel upon one or more of said highways or parts of highways. Upon receipt of such petition the proper authorities of the Commonwealth or of any political subdivision thereof, as the case may be, shall set a day for hearing and give notice thereof by publication in a newspaper having general circulation in the political subdivision in which such property is located, such notice to be at least seven days prior to the date set for hearing. If after hearing the proper authorities of the Commonwealth or of any political subdivision thereof determine that the public safety and the safety of the property of the petitioner requires it they may by regulation close to public use and travel or may by regulation restrict or regulate the use and travel upon one or more of said highways or parts of highways: Provided, however, That the proper authorities of the Commonwealth or of any political subdivision thereof may issue written permits to travel over the premises so closed, to responsible and creditable persons for such term under such conditions and in such form as the public authorities may prescribe. Notices in letters at least three inches high containing the following: "Closed By Order Of ______; Passing Prohibited Under Penalty" or "Public Travel On This Highway Restricted Or Regulated By Order Of ______; Penalty For Violation" shall be posted conspicuously at each end of the premises closed or regulated or restricted by such order. The proper authorities of the Commonwealth or of any political subdivision thereof may at any time revoke or modify any regulation they have made.
Whoever violates any regulation made under this section during a period of national emergency or war shall, upon conviction thereof in a summary proceeding, be sentenced to pay a fine not more than fifty dollars ($50.00), or to undergo imprisonment for not exceeding ten (10) days, or both.
35 P.S. § 2107