Fallback / backup channels across the USA

when a TRS crashes or a radio gets into a dead spot ... sometimes an
agency will use 'fallback' or 'reserve' or 'backup' channels

taking a peek around the Radio Reference pages .. we found the following ...

all of this is 800 mhz channels

Baltimore MD ... FD has 2 mobile only talkaround channels .. police has nothing

Fairfax County VA ... FD has 2 mobile only talkaround channels ...
police has nothing

Alexandria VA ... FD has 1 talkaround mobile only channel .... police
has nothing

Arlington County VA ... FD has 1 conventional repeater channel in
subways plus 1 mobile only talkaround channel ... police has nothing

North Charleston SC ... neither police nor fire has any backup channels

Charleston SC .. FD has 1 channel with 4 pLs ... maybe mobiles only
... police has nothing

Columbia SC ... FD has some simplex channels

Columbus OH ... county has 3 mobile only channels for interops ...
nothing else listed

Cleveland OH ... FD has 860.9875 M pl 67.0 "Direct 15"

Cincinnati OH ... FD has "Highrise Repeater 1 and 2" channels ...
857.2625R + 858.2625R ... FCC license shows 190 FB2T 35/35 + 90 M 2/2
with 20K0F3E and 16K0F1D ... no idea what that is supposed to
represent

Bottom line ... it looks like most agencys expect everyone to find
their way to 'ICALL 1' ... somehow ... and 'ICALL 1' probably will
never work inside any building ... so folks will need to find their
way to 'ICALL 1 Direct' ... should be fun