92 Ill. Adm. Code 540.90
Engineering Study
Section 540
Section 540.90 Engineering
Study
Although the warrants given
above are the minimum which must be met, the final determination to erect an
overpass structure will be based on an engineering study. Such study should
include, but not be restricted to, the following considerations:
a) The general conditions that require the school crossing are
sufficiently permanent to justify such a structure.
b) The physical characteristics of the location make such a
structure feasible from an engineering standpoint.
c) Such a structure could serve other pedestrians besides school
children.
d) There is no reasonable possibility that the replanning of
school routes or school districts will eliminate the need for such a structure.
e) A comparison between the structure and other types of controls
indicates the structure is justified from a long-range standpoint.