(1) A diagnostic review will be conducted by a diagnostic review team at the site for each public at-grade railroad crossing considered for:
(a) proposed signals;
(b) upgrade of existing signals;
(c) proposed removal of signals;
(d) circuitry upgrade;
(e) road approach work;
(g) other safety improvements deemed necessary by the diagnostic review team; and
(h) interconnection between railroad signals and traffic control signals.
(2) The road authority, railroad or MDT can request a diagnostic review be initiated to address specific or unusual needs at a public at-grade crossing.