Upon adoption of an official map, the advance acquisition of rights-of-way for those streets on the official map shall proceed as expeditiously as feasible. Impl. am. Acts 1959, ch. 9, § 3; Acts 1965, ch. 251, § 8; impl. am. Acts 1972, ch. 829, § 7; T.C.A., §§ 54-2208, 54-18-209; Acts 1981, ch. 264, § 12.