As used in this chapter:
(a) "Unimproved street" means a street without any surface improvement.
(b) “Improved street” means a street with an added surface by stabilization such as asphalt, soil, cement, oil or any bituminous application.
(c) "Paved street" means a street surface laid on concrete, sand, crushed slag or gravel, or a street constructed of sheet asphalt, asphaltic concrete or resurface of sheet asphalt or asphaltic concrete over brick or a street of entire concrete construction. (1964 Code §519.50)