An Act to facilitate vehicular traffic across the Commonwealth by providing for the construction, operation and maintenance of turnpike extensions in southwestern Pennsylvania, and conferring powers and imposing duties on the Pennsylvania Turnpike Commission; authorizing the issuance of turnpike revenue bonds, notes or other obligations of the Commonwealth, payable solely from revenues of the commission, including tolls, or from such funds as may be available to the commission for that purpose, to pay the cost of such turnpikes; providing that no debt of the Commonwealth shall be incurred in the exercise of any of the powers granted by this act; providing for the collection of tolls for the payment of such bonds, notes or other obligations, and for the cost of maintenance, operation and repair of the turnpikes; making such turnpike bonds, notes or other obligations exempt from taxation; constituting the same legal investments in certain instances; requiring suits against the commission to be brought in Dauphin County; prescribing conditions on which such turnpikes shall become free; providing for grade separations, grade changes, relocations, restorations and vacation of public roads and State highways affected by the turnpike; providing for the purchasing or condemnation of land and procedure for determining damages in condemnation; granting certain powers and authority to municipalities and agencies of the Commonwealth to cooperate with the commission; and authorizing the issuance of turnpike revenue refunding bonds.