General design requirements:
(A) Design period shall be 20 year minimum.
(B) Formal traffic study with projections and supporting data shall be submitted for design of all street classifications to provide minimum ESAL criteria.
(C) Initial (present) serviceability index factor shall be four and one half.
(D) Terminal serviceability index factor shall be two and one half minimum.
(E) All designs shall be in accordance with the AASHTO Guide for Design of Pavement Structures, latest edition.
STRUCTURAL NUMBER LAYER COEFFICIENTS
Pavement Materials | Min. Thickness of course (inches) | Structural Coefficient per inch thickness |
Asphaltic Concrete Surface | 3 | .44 |
Asphalt Concrete Binder | 2 | .44 |
Asphalt Stabilized Base | 4 | .34 |
Crushed Stone Base (Flexible) | 6 | .14 |
Crushed Stone Base (Rigid) | 3 | .14 |
Portland Cement Concrete | 6 | * |
(Ord. 2009-11-347, passed 11-3-09; Am. Ord. 2010-06-356, passed 6-1-10
; Am. Ord. 2018-11-816, passed 11-6-18)