31-1-1      Highway defined.
31-1-2      Bridges and culverts part of highway.
31-1-3      Existing highways--Continuation as established.
31-1-4      Classification of highways of state.
31-1-5      Administrative systems of highways--Classification.
31-1-6      Federal aid systems--Classification.
31-1-7      Coexistence of administrative and federal aid systems.