36 Pa. Stat. § 653i
Whenever the commission decides to acquire any lands, rights, rights of way, easements and franchises or interests therein by condemnation, as hereinbefore provided, and has tendered a bond or other security to secure the owner or owners for damages, and the same has been accepted, or, if the acceptance of said bond has been refused and the same has been filed in and approved by the court in which such condemnation proceeding is instituted, the commission shall have the right to immediate possession of the property which is the subject matter of the condemnation proceedings and may enter thereon in the name of the commission. If the owner, lessee or occupier of any of said premises shall refuse to remove his personal property therefrom or give up possession thereof, the commission may proceed to obtain possession in the manner now provided by law for the obtaining possession by the Secretary of Highways of occupied structures.
36 P.S. § 653i