The evaluation of available pertinent information, and the
application of appropriate principles, provisions, and practices as
contained in this Manual and other sources, for the purpose of
deciding upon the applicability, design, operation, or installation
of a traffic control
device. Engineering judgment shall be exercised by
an engineer, or by an individual working under the supervision of
an engineer, through the application of procedures and criteria
established by the engineer. Documentation of engineering judgment
is not required. MUTCD2009 Edition with
May 2012 Revisions 1
and 2
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