I miss Drake

[Don Galt]

>> The preference was established at an intermediate signal one section
before entering the previous passing track.  Operating orders forbade
"stealing the light" (leaving the siding on a dark headblock), which would
indeed give you protection but would wreak havoc on the schedule! <<

I barely understand the signalling principal as described earlier, but
haven't a clue as to what "leaving the siding on a dark headblock" means.

Anybody have a copy of "Signalling for Dummies?"

D2