(a) The word “commission” shall mean the Pennsylvania Turnpike Commission created by the act, approved the twenty-first day of May, one thousand nine hundred thirty-seven (Pamphlet Laws 774), and its amendments.¹

(b) The word “Turnpike” shall mean the turnpike heretofore constructed under the provisions of the said act, approved the twenty-first day of May, one thousand nine hundred thirty-seven (Pamphlet Laws 774), and its amendments.

(c) The term “Eastern Extension” shall mean the turnpike authorized to be constructed and financed under the provisions of the act, approved the sixteenth day of May, one thousand nine hundred forty (1941--Pamphlet Laws 949), known as the “Pennsylvania Turnpike Philadelphia Extension Act,” and its amendments.²

(d) The term “Western Extension” shall mean the turnpike authorized to be constructed and financed under the provisions of the act, approved the eleventh day of June, one thousand nine hundred forty-one (Pamphlet Laws 101), known as the “Western Pennsylvania Turnpike Extension Act,” and its amendments.³

(e) The term “Erie Extension” shall mean the turnpike authorized to be constructed and financed under the provisions of the act, approved the ninth day of May, one thousand nine hundred forty-nine (Pamphlet Laws 1037), known as the “Pennsylvania Turnpike Erie Extension Act,” and its amendments.⁴

(f) The term “Scranton Extension” shall mean the turnpike authorized to be constructed and financed under the provisions of the act, approved the ninth day of May, one thousand nine hundred forty-nine (Pamphlet Laws 1050), known as the “Pennsylvania Turnpike Scranton Extension Act,” and its amendments.⁵

(g) The term “Delaware River Extension” shall mean the turnpike and bridge authorized to be constructed and financed under the provisions of the act, approved the twenty-third day of May, one thousand nine hundred fifty-one (Act No. 74), known as the “Pennsylvania Turnpike Delaware River Extension Act,” and its amendments.⁶

(h) The word “project” shall mean the Turnpike, the Eastern Extension, the Western Extension, the Erie Extension, the Scranton Extension, the Delaware River Extension, or any extension or bridge heretofore or hereafter authorized to be constructed or acquired in whole or in part by the commission.

(i) The term “Pennsylvania Turnpike System” shall mean, to the extent designated by the commission, the Turnpike, the Eastern Extension and the Western Extension, as heretofore combined for financing purposes under the provisions of the act, approved the twenty-first day of June, one thousand nine hundred forty-seven (Pamphlet Laws 877),⁷ the Erie Extension, the Scranton Extension, the Delaware River Extension, and any additional projects.

(j) The word “cost” shall have the same meaning as the term “cost of the turnpike” as defined in each of the acts hereinabove mentioned or their amendments as applied to the project authorized in such act, or the cost of any project heretofore or hereafter authorized as defined in the act authorizing such project as applied to such project.